Wiring equipment

Abstract

To improve the workability of the construction work.SOLUTION: A wiring device A1 includes: a first circuit breaker 2; a second circuit breaker 3; a first terminal block 4; and a box 1. The first circuit breaker 2 includes a primary side terminal 21 which is electrically connected with a first trunk line X1. The second circuit breaker 3 includes a primary side terminal 31 which is electrically connected with a secondary side terminal 22 of the first circuit breaker 2. The first terminal block 4 is electrically connected with the secondary side terminal 22 of the first circuit breaker 2. The box accommodates the first circuit breaker 2, the second circuit breaker 3 and the first terminal block 4. The box 1 includes: a first drawing-in port 11 for drawing in the first trunk line X1; and a second drawing-in port 12 for drawing in the second trunk line X2 electrically connected with the first terminal block 4.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a wiring device, and more particularly to a wiring device for supplying power to charging facilities for charging electric vehicles such as electric automobiles.

Background Art

[0002] As a conventional example, the wiring system described in Patent Document 1 is exemplified. The wiring system described in Patent Document 1 includes a relay box (wiring device), an indoor main line, and a branch main line. The relay box is installed on the roof side of a dwelling unit. Also, the relay box is configured to draw in the secondary main line of a watt-hour meter installed on the roof side of the same dwelling unit. The indoor main line is drawn out from the relay box and wired to a residential distribution board in the dwelling unit. The branch main line is drawn out from the relay box and connected to a charger installed on the roof side of the dwelling unit. The charger supplies a charging current to an electric vehicle via a charging connector.

[0003] The relay box houses a main breaker and a branch breaker. The primary side of the main breaker is connected to the secondary main line of the watt-hour meter, and the secondary side of the main breaker is connected to both the indoor main line and the branch main line. The branch breaker is arranged in the middle of the branch main line. The residential distribution board is installed in the dwelling unit and is assembled with one main switch and a plurality of branch breakers.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the relay box (wiring device) described in Patent Document 1, it is necessary to connect two types of main lines, an indoor main line and a branch main line, to the secondary side (secondary terminal) of the main breaker. Moreover, because the conductors of the electrical cables used for the indoor main lines are relatively thick, the wiring work is troublesome, and there is a desire to improve the workability of the installation work.

[0006] The purpose of this disclosure is to provide a wiring device that can improve the work efficiency of construction work. [Means for solving the problem]

[0007] A wiring device according to one aspect of the present disclosure comprises a first switch, a second switch, a terminal block, and a box. The first switch has a primary terminal to which a first main line is electrically connected. The second switch has a primary terminal to which the secondary terminal of the first switch is electrically connected. The terminal block is electrically connected to the secondary terminal of the first switch. The box houses the first switch, the second switch, and the terminal block. The box has a first entry point for drawing in the first main line and a second entry point for drawing in a second main line which is electrically connected to the terminal block. The second switch is housed in the box so as to be adjacent to the terminal block with the first switch in between. [Effects of the Invention]

[0008] The wiring device disclosed herein has the effect of improving the work efficiency of installation work. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a block diagram of a wiring device according to an embodiment of the present disclosure. [Figure 2] Figure 2 is a perspective view of the box in the same wiring device. [Figure 3] Figure 3 is a schematic diagram showing the installation status of the wiring device mentioned above. [Figure 4] Figure 4 is an exploded perspective view of a modified example of the wiring device according to the embodiment. [Figure 5]Figure 5 is a perspective view of the modified wiring device shown above with the door closed. [Figure 6] Figure 6 is a perspective view of the wiring device of the above modified example with the door open. [Figure 7] Figure 7 is a front view of the modified wiring device shown above with the door and protective plate removed. [Figure 8] Figure 8 is a front view of another embodiment of the wiring device of the modified example shown above. [Modes for carrying out the invention]

[0010] Hereinafter, a wiring device according to an embodiment of this disclosure will be described in detail with reference to the drawings. However, the figures described in the following embodiments are schematic diagrams, and the ratios of the size and thickness of each component do not necessarily reflect the actual dimensional ratios. Furthermore, the configuration described in the following embodiments is merely one example of this disclosure. This disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of this disclosure can be achieved.

[0011] (1) Overview Wiring device A1 according to this embodiment includes a first switch 2, a second switch 3, a first terminal block 4, and a box 1 (see Figure 1). The first switch 2 has a primary terminal 21 to which the first main line X1 is electrically connected. The second switch 3 has a primary terminal 31 to which the secondary terminal 22 of the first switch 2 is electrically connected. The first terminal block 4 is electrically connected to the secondary terminal 22 of the first switch 2. The box 1 houses the first switch 2, the second switch 3, and the first terminal block 4. The box 1 has a first entry port 11 for drawing in the first main line X1 and a second entry port 12 for drawing in the second main line X2 which is electrically connected to the first terminal block 4.

[0012] The first main line X1 is electrically connected to, for example, the watt-hour meter M1. The second main line X2 is electrically connected to, for example, a distribution board (residential distribution board B1). Also, to the secondary side terminal 32 of the second switch 3, for example, a charger C1 for charging an electric vehicle is electrically connected.

[0013] Here, the wiring work (the first circuit 71 and the second circuit 72) between the first switch 2, the second switch 3, and the first terminal block 4 housed in the box 1 can be completed in the process of manufacturing the wiring device A1 according to the embodiment. Therefore, at the construction site, by electrically connecting the second main line X2 drawn from the second lead-in port 12 of the box 1 to the first terminal block 4, the wiring work between the second main line X2 and the primary side terminal 21 of the first switch 2 becomes unnecessary.

[0014] Thus, the wiring device A1 according to the embodiment can improve the workability of the construction work by eliminating some of the work (the wiring work between the second main line X2 and the secondary side terminal 22 of the first switch 2) that was necessary in the conventional example.

[0015] (2) Details of the wiring device according to the embodiment The wiring device A1 according to the embodiment (hereinafter abbreviated as the wiring device A1) is installed on the rooftop side (the surface of the outer wall) of the house H1 as shown in FIG. 3. On the rooftop side of the house H1, a watt-hour meter M1 and a charger C1 for an electric vehicle are installed together with the wiring device A1.

[0016] The watt-hour meter M1 is electrically connected to a lead-in wire E1 drawn from the pole-mounted transformer D1 to the house H1. The watt-hour meter M1 is electrically connected to the wiring device A1 by the first main line X1. For the lead-in wire E1 and the first main line X1, a three-core electric cable for outdoor wiring including two voltage side lines and one neutral line of a single-phase three-wire circuit is used. The watt-hour meter M1 measures the amount of electric power supplied from the lead-in wire E1 through the first main line X1 to the house H1 and the charger C1.

[0017] The charger C1 has a housing C10, a charging cable C11, and a charging connector C12. The housing C10 houses a charging control device and is attached to the rooftop side of the house H1. The charging cable C11 is drawn out from the housing C10. A charging connector C12 is provided at the tip of the charging cable C11. The charging connector C12 is detachably connected to the charging inlet of an electric vehicle (including a plug-in hybrid electric vehicle; the same shall apply hereinafter).

[0018] The charging control device communicates with the charging control ECU (Electronic Control Unit) of the electric vehicle via the charging connector C12 and the charging cable C11, and controls the supply and cut-off of power to the charging cable C11 based on the instructions of the charging control ECU.

[0019] The wiring device A1 is electrically connected to the charger C1 by the third main line X3. Also, the wiring device A1 is electrically connected to a residential distribution board (hereinafter abbreviated as the house board) B1 by the second main line X2.

[0020] The house board B1 is installed indoors in the house H1. The house board B1 has one main switch B11 and a plurality of branch switches B12. A three-core electric cable for indoor wiring such as a VVF cable is used for the second main line X2. The second main line X2 is electrically connected to the primary side terminal of the main switch B11.

[0021] The wiring device A1 includes a box 1. As shown in FIG. 2, the box 1 has a back plate 15, an upper plate 16, a lower plate 17, and a pair of side plates 18. The upper plate 16, the lower plate 17, and the pair of side plates 18 project forward from the upper end, the lower end, and the left and right ends of the rectangular back plate 15, respectively. That is, the box 1 is formed in a box shape with an open front. The back plate 15, the upper plate 16, the lower plate 17, and the pair of side plates 18 are preferably integrally formed of a synthetic resin material having self-digestibility such as polycarbonate resin. Alternatively, the back plate 15, the upper plate 16, the lower plate 17, and the pair of side plates 18 may be formed of a metal material such as sheet metal.

[0022] A second entry point 12 is provided at the bottom of the back panel 15. The second entry point 12 is a round hole that penetrates the back panel 15 in the direction of its thickness. The second main line X2 is drawn in through the second entry point 12. The second main line X2 is brought out from inside the house H1 through a hole that penetrates the exterior wall of the house H1.

[0023] The bottom plate 17 is provided with a first entry opening 11 and a third entry opening 13. The first entry opening 11 and the third entry opening 13 are through holes that penetrate the bottom plate 17 in the thickness direction. The first main line X1 is drawn in through the first entry opening 11. The third main line X3 is drawn in through the third entry opening 13. Note that the location of the first entry opening 11 and the third entry opening 13 is not limited to the bottom plate 17, but may also be provided on at least one of the pair of side plates 18 or on the top plate 16. However, in order to prevent rainwater from entering the box 1 via the first main line X1 and the third main line X3, it is preferable that the first entry opening 11 and the third entry opening 13 be provided on the bottom plate 17.

[0024] The front of box 1 is closed by a door (not shown) that can be opened and closed. The door is made of the same material as box 1 (such as a self-extinguishing synthetic resin material). The door may also be attached to box 1 by hinges so that it can rotate between a closed position and an open position.

[0025] Box 1 houses the first switch 2, the second switch 3, and the first terminal block 4. Box 1 also houses the second terminal block 5, a surge arrester 6, and the first to fourth circuits 71-74 (see Figure 1).

[0026] The first switch 2 is composed of a circuit breaker. However, the first switch 2 may be composed of a ground fault circuit interrupter. The first switch 2 has three primary terminals 21 and three secondary terminals 22. One of the three primary terminals 21 is electrically connected to each of the three primary terminals 21. However, two of the three first main lines X1, corresponding to the voltage lines, are connected one each to the two primary terminals 21 at each end, and the remaining first main line X1, corresponding to the neutral line, is connected to the central primary terminal 21. In other words, the primary terminals 21 of the first switch 2 are electrically connected to the electricity meter M1 via the first main lines X1.

[0027] The three secondary terminals 22 of the first switch 2 are electrically connected one by one to the three first circuits 71. In addition, the two end terminals 22 of the three secondary terminals 22 of the first switch 2 are electrically connected one by one to the two second circuits 72. In other words, the two second circuits 72 are electrically connected to the two first main lines X1 corresponding to the voltage side lines via the first switch 2. Note that the first circuits 71 use insulated wires whose conductor cross-sectional area is smaller than that of the conductors of the first main lines X1. Furthermore, the second circuits 72 use insulated wires whose conductor cross-sectional area is smaller than that of the conductors of the first circuits 71.

[0028] The first terminal block 4 has three pairs of screw terminals 41, 42, and 43. These three pairs of screw terminals 41, 42, and 43 are electrically connected via three conductive plates. However, each pair of screw terminals 41, 42, and 43 and the conductive plates are electrically insulated from each other. Three first circuits 71 are electrically connected to each of the three screw terminals 41, 42, and 43. In addition, three second main lines X2 are electrically connected to each of the three pairs of screw terminals 41, 42, and 43. In other words, the three first circuits 71 are electrically connected to each of the three second main lines X2 via the first terminal block 4.

[0029] The second switch 3 is composed of a circuit breaker, similar to the first switch 2. However, the second switch 3 may be composed of a ground fault circuit interrupter. The second switch 3 has two primary terminals 31 and two secondary terminals 32. Two second circuits 72 are electrically connected to each of the two primary terminals 31. Two third circuits 73 are electrically connected to each of the two secondary terminals 32. The third circuits 73 use insulated wires whose conductor cross-sectional area is the same as that of the conductors in the second circuits 72.

[0030] The second terminal block 5 has three pairs of screw terminals 51, 52, and 53. These three pairs of screw terminals 51, 52, and 53 are electrically connected via three conductive plates. However, each pair of screw terminals 51, 52, and 53 and the conductive plates are electrically insulated from each other. Two third circuits 73 are electrically connected to each pair of screw terminals 51 and 52. Furthermore, two fourth circuits 74 are electrically connected to each pair of screw terminals 51 and 52. In addition, two third main lines X3 are electrically connected to each pair of screw terminals 51 and 52. That is, the two third circuits 73 and the two fourth circuits 74 are each electrically connected to the two third main lines X3 via the second terminal block 5. Furthermore, the fourth circuit 74 uses an insulated wire whose conductor cross-sectional area is smaller than that of the conductor in the third circuit 73.

[0031] The surge arrester 6 is equipped with two input terminals 61, one grounding terminal 62, an arrester, and a varistor. The arrester and varistor are inserted in series between each input terminal 61 and the grounding terminal 62. The surge arrester 6 absorbs the energy of large surge voltages with the arrester while suppressing follow-through with the varistor. The two input terminals 61 are electrically connected one by one to two fourth circuits 74. The grounding terminal 62 is electrically connected to the screw terminal 53 of the second terminal block 5 via the fifth circuit 75. The pair of screw terminals 53 is electrically connected to the grounding wire X4. The grounding wire X4 is grounded to the earth outside the house H1 by Class D grounding work.

[0032] (3) Assembly of the wiring device according to the embodiment Next, the assembly procedure for wiring device A1 will be explained. However, the assembly procedure described below is just one example, and it is possible to rearrange the order of some of the steps.

[0033] First, the worker assembling the wiring device A1 attaches the first switch 2, the second switch 3, the first terminal block 4, the second terminal block 5, and the surge arrester 6 to the mounting plate. The mounting plate is made of, for example, a metal plate. The first switch 2, the second switch 3, the first terminal block 4, the second terminal block 5, and the surge arrester 6 can be attached to the mounting plate, for example, by screw fastening.

[0034] Next, the worker electrically connects (wires) the first switch 2, the second switch 3, the first terminal block 4, the second terminal block 5, and the surge arrester 6, which are mounted on the mounting plate, to the first to fifth circuits 71 to 75.

[0035] Finally, the worker places the mounting plate, to which the first switch 2, the second switch 3, the first terminal block 4, the second terminal block 5, and the surge arrester 6 are attached, into the box 1, and secures the mounting plate to the box 1 by, for example, screwing the mounting plate to the back plate 15. With these steps, the assembly of the wiring device A1 is completed.

[0036] Here, the wiring device A1 may be configured without a mounting plate, with the first switch 2, second switch 3, first terminal block 4, second terminal block 5, and surge arrester 6 directly attached to the back plate 15 of the box 1. However, by configuring the wiring device A1 to attach the first switch 2, second switch 3, first terminal block 4, second terminal block 5, and surge arrester 6 to a mounting plate, the worker can perform the wiring work for the first to fifth circuits 71 to 75 outside the box 1. As a result, the wiring device A1 can improve the workability of the assembly work compared to the case where the first switch 2, second switch 3, first terminal block 4, second terminal block 5, and surge arrester 6 are directly attached to the back plate 15 of the box 1.

[0037] (4) Installation procedure of the wiring device according to the embodiment Next, we will explain the installation procedure for wiring device A1. However, the installation procedure described below is just one example, and it is possible to change the order of some of the steps.

[0038] The worker performing the installation attaches the box 1, from which the mounting plate has been removed, to the exterior wall of house H1. At this time, the worker pulls the second main line X2, which has been pulled out from inside house H1 through a hole penetrating the exterior wall of house H1, into the box 1 through the second entry port 12 of the back plate 15.

[0039] Next, the worker places the previously removed mounting plate into the box 1 and attaches it to the back plate 15. After that, the worker electrically connects the second main line X2, which was drawn in from the second entry port 12, to the screw terminals 41, 42, and 43 of the first terminal block 4.

[0040] Furthermore, the worker electrically connects the first main line X1, which is drawn in from the first entry point 11 of the lower plate 17, to the primary terminal 21 of the first switch 2. In addition, the worker electrically connects the third main line X3, which is drawn in from the third entry point 13 of the lower plate, to the screw terminals 51 and 52 of the second terminal block 5. Furthermore, the worker electrically connects the grounding wire X4, which is drawn in from the third entry point 13, to the screw terminal 53 of the second terminal block 5. With these steps, the installation of wiring device A1 is completed.

[0041] Here, if the wiring device A1 does not have the first terminal block 4, the worker will need to directly connect the second main line X2, which is drawn in from the second entry port 12, to the secondary terminal 22 of the first switch 2. However, the insulated wire used for the second main line X2 is thicker (has a larger conductor cross-sectional area) than the insulated wire used for the first circuit 71 that connects the first terminal block 4 and the secondary terminal 22 of the first switch 2, making it difficult to perform the connection work inside the box 1.

[0042] In contrast, in wiring device A1, the second main line X2 is connected to the first terminal block 4, not to the secondary terminal 22 of the first switch 2. Therefore, wiring device A1 eliminates the need for wiring the second main line X2 to the secondary terminal 22 of the first switch 2, thereby improving the efficiency of installation work.

[0043] (5) Modified examples of embodiments Next, a modified example of the wiring device according to the embodiment will be described.

[0044] The modified wiring device A2 (hereinafter abbreviated as wiring device A2) includes a synthetic resin cabinet 8, as shown in Figures 4 to 7. The cabinet 8 has a box 80 for housing the first switch 2, etc., a protective plate 83, and a door 84 (see Figure 4).

[0045] The box 80 has a mounting plate 81 on which internal equipment such as a first switch 2, a second switch 3, a first terminal block 4, a second terminal block 5, a surge arrester 6, and a fuse holder H2 is mounted, and a cover 82. The mounting plate 81 is formed in the shape of a rectangular flat plate from a self-extinguishing synthetic resin material. A metal mounting base 810 is provided on the front of the mounting plate 81. The internal equipment is mounted on the mounting base 810. That is, the internal equipment is mounted on the mounting plate 810 via the mounting base 810. Here, four round holes 811 are provided at the bottom of the mounting plate 81 (see Figure 7). These four round holes 811 can be used as a first entry point, a second entry point, a third entry point, and a fourth entry point.

[0046] The cover 82 is formed in the shape of a rectangular frame from a self-extinguishing synthetic resin material. The cover 82 is attached to the front surface of the mounting plate 81. In other words, the cover 82 constitutes the upper, lower, left, and right walls of the box 80. Two knockout sections 820 are provided on the lower wall of the cover 82 (see Figure 4). These knockout sections 820 can be used as a first and a third (fourth) entry point.

[0047] The protective plate 83 is formed from a synthetic resin material into a rectangular flat plate shape (see Figure 4). The protective plate 83 is attached to the cover 82 so as to cover the internal equipment from the front. The protective plate 83 is provided with several windows 830. These windows 830 face the first switch 2, the second switch 3, the surge arrester 6, and the fuse holder H2 (see Figure 6). That is, the handles of the first switch 2 and the second switch 3 can be operated through the windows 830. In addition, the operating status of the surge arrester 6 can be checked through the windows 830. Furthermore, the fuse in the fuse holder H2 can be replaced through the windows 830.

[0048] The door 84 is formed in a box shape with an open rear surface using a self-extinguishing synthetic resin material (see Figures 4 to 6). The door 84 is rotatably mounted on the top surface of the cover 82 (see Figure 6). In other words, the door 84 is rotatably mounted on the box 80 (cover 82) between a closed state that covers the opening on the front of the box 80 (see Figure 5) and an open state that opens the front of the box 80 (see Figure 6).

[0049] Here, as shown in Figure 7, the first switch 2 is housed approximately in the center of the box 80. The second switch 3 is housed to the right of the first switch 2 when viewed from the front of the box 80. The first terminal block 4 is housed to the left of the first switch 2 when viewed from the front of the box 80. In other words, the second switch 3 is housed in the box 80 adjacent to the first terminal block 4, with the first switch 2 in between. By arranging the second switch 3 and the first terminal block 4 on either side of the first switch 2 in this way, the wiring device A1 can shorten the wiring required to electrically connect the first switch 2, the second switch 3, and the first terminal block 4.

[0050] Incidentally, during the installation of wiring device A1, there is a possibility that the first main line X1 may be mistakenly connected to the primary screw terminals 41, 42, and 43 of the first terminal block 4. Since the first main line X1 is a power supply path for both the residential panel B1 and the charger C1, a larger current may flow through it compared to the second main line X2, which is a power supply path only for the residential panel B1. Therefore, if the first main line X1 is mistakenly connected to the first terminal block 4, the amount of heat generated by the conductive plate of the first terminal block 4 may increase, potentially causing the temperature of the first terminal block 4 to rise excessively.

[0051] Therefore, in wiring device A1, if the rated capacity of the first terminal block 4 is equal to or greater than the rated capacity of the first switch 2, then even if equipment that should not be connected to the first terminal block 4 (electricity meter M1) is mistakenly connected, malfunctions in the first terminal block 4 are less likely to occur.

[0052] Furthermore, it is preferable that a display member 44 be provided on the front of the first terminal block 4 (see Figure 7). The display member 44 preferably has letters or symbols indicating the type of equipment (residential panel B1) that should be electrically connected to the first terminal block 4 via the second main line X2. The display member 44 is, for example, a tape made of synthetic resin and is attached to the first terminal block 4 with adhesive applied to the back surface. Also, a message such as "Connect to the distribution board." is printed on the surface of the display member 44. By attaching such a display member 44 to the front of the first terminal block 4, it is possible to prevent equipment that should not be connected to the first terminal block 4 (such as an electricity meter M1) from being mistakenly connected.

[0053] Furthermore, it is preferable that the door 84 is formed so that at least a portion of the first switch 2 and the second switch 3 are visible when the front of the box 80 is closed. For example, it is preferable that an opening 840 is provided on the front of the door 84 and the opening 840 is covered with a light-transmitting cover 841 (see Figure 8). The light-transmitting cover 841 is preferably made of a light-transmitting synthetic resin such as polycarbonate resin or acrylic resin.

[0054] However, if the door 84 is configured as described above, the wiring device A1 can visually check the status of the first switch 2 and the second switch 3 housed in the box 80 through the opening 840 of the door 84, thereby improving convenience.

[0055] (6) Advantages of the wiring device according to the embodiment Wiring device A1 does not necessarily have to have a second terminal block 5. If wiring device A1 does not have a second terminal block 5, the third main line X3 drawn in from the third entry port 13 must be directly connected to the secondary terminal 32 of the second switch 3. Since wiring device A1 has a second terminal block 5 housed in box 1 and electrically connected to the secondary terminal 32 of the second switch 3, the workability of the installation work can be further improved compared to the case where the third main line X3 is directly connected to the secondary terminal 32 of the second switch 3.

[0056] The wiring device A1, by including a surge arrester 6, can protect the charger C1 connected to the secondary terminal (32) of the second switch (3) from overvoltages such as lightning surges. However, the wiring device A1 does not necessarily need to include a surge arrester 6.

[0057] Furthermore, the wiring device A1 includes a second terminal block 5 that is electrically connected to the secondary terminal 32 of the second switch 3, and the surge arrester 6 is grounded via the second terminal block 5. Therefore, compared to the case where the second terminal block 5 is not provided, the workability of the installation work can be further improved.

[0058] Here, since the wiring device A1 houses the first to fourth circuits 71 to 74 in box 1, the work of housing the first to fourth circuits 71 to 74 in box 1 at the construction site is eliminated, further improving the work efficiency of the construction work. However, the wiring device A1 does not need to house at least one of the first to fourth circuits 71 to 74 in box 1.

[0059] (7) Summary A wiring device (A1; A2) according to a first aspect of the present disclosure comprises a first switch (2), a second switch (3), a terminal block (first terminal block 4), and a box (1; 80). The first switch (2) has a primary terminal (21) to which a first main line (X1) is electrically connected. The second switch (3) has a primary terminal (31) to which the secondary terminal (22) of the first switch (2) is electrically connected. The terminal block is electrically connected to the secondary terminal (22) of the first switch (2). The box (1; 80) houses the first switch (2), the second switch (3), and the terminal block. The box (1; 80) has a first entry point (11; knockout section 820) for drawing in a first main line (X1) and a second entry point (12; round hole 811) for drawing in a second main line (X2) that is electrically connected to the terminal block.

[0060] The wiring device (A1; A2) according to the first embodiment can improve the work efficiency of installation work by eliminating some of the work required in the conventional example, specifically the wiring work of connecting the second main line (X2) and the secondary terminal (22) of the first switch (2).

[0061] Wiring devices (A1;A2) according to a second aspect of the present disclosure can be realized in combination with the first aspect. In the wiring device (A1;A2) according to the second aspect, the second switch (3) is preferably housed in a box (1;80) adjacent to the terminal block with the first switch (2) in between.

[0062] The wiring device (A1; A2) according to the second embodiment can shorten the wiring for electrically connecting the first switch (2), the second switch (3), and the terminal block.

[0063] A wiring device (A1;A2) according to a third aspect of the present disclosure can be realized in combination with the first or second aspect. In the wiring device (A1;A2) according to the third aspect, the box (1;80) is preferably formed in a box shape with an open front. The terminal block is preferably provided with an indicator member (44) at a position facing the front of the box (1;80). The indicator member (44) is preferably marked with letters or symbols that identify the type of equipment to be electrically connected to the terminal block via a second trunk line (X2).

[0064] The wiring device (A1; A2) according to the third embodiment can prevent devices that should not be connected to the terminal block from being mistakenly connected.

[0065] A wiring device (A1; A2) according to a fourth aspect of this disclosure can be realized in combination with any of the first to third aspects. In the wiring device (A1; A2) according to the fourth aspect, the rated capacity of the terminal block is preferably equal to or greater than the rated capacity of the first switch (2).

[0066] The wiring device according to the fourth embodiment (A1; A2) is less likely to cause malfunctions in the terminal block even if equipment that should not be connected to the terminal block is mistakenly connected to it.

[0067] A wiring device (A1;A2) according to a fifth aspect of the present disclosure can be realized in combination with any of the first to fourth aspects. The wiring device (A1;A2) according to the fifth aspect preferably further comprises another terminal block (second terminal block 5). The other terminal block is preferably electrically connected to the secondary terminal (32) of the second switch (3). The other terminal block is preferably housed in a box (1;80).

[0068] The wiring device (A1;A2) according to the fifth embodiment includes a separate terminal block (second terminal block 5) housed in a box (1;80) and electrically connected to the secondary terminal (32) of the second switch (3), thereby further improving the workability of the installation work.

[0069] A wiring device (A1;A2) according to a sixth aspect of the present disclosure can be realized in combination with any of the first to fifth aspects. The wiring device (A1;A2) according to the sixth aspect preferably further comprises a surge arrester (6) housed in a box (1;80). The surge arrester (6) preferably protects electrical equipment (charger C1) connected to the secondary terminal (32) of the second switch (3).

[0070] The wiring device (A1; A2) according to the sixth embodiment can protect electrical equipment connected to the secondary terminal (32) of the second switch (3) from overvoltages such as lightning surges.

[0071] A wiring device (A1;A2) according to a seventh aspect of the present disclosure can be realized in combination with a fifth aspect. The wiring device (A1;A2) according to the seventh aspect preferably further comprises a surge arrester (6) housed in a box (1;80) and protecting an electrical device (charger C1) electrically connected to the secondary terminal (32) of a second switch (3). The surge arrester (6) is preferably grounded via another terminal block.

[0072] The wiring device (A1; A2) according to the seventh embodiment protects the electrical equipment connected to the secondary terminal (32) of the second switch (3) from overvoltages such as lightning surges, and further improves the workability of installation work compared to the case in which no other terminal block is provided.

[0073] Wiring devices (A1;A2) according to the eighth aspect of the present disclosure can be realized in combination with any of the first to seventh aspects. The wiring device (A1;A2) according to the eighth aspect preferably further comprises a first circuit (71) and a second circuit (72). The first circuit (71) preferably electrically connects the secondary terminal (22) of the first switch (2) to the terminal block. The second circuit (72) preferably electrically connects the secondary terminal (22) of the first switch (2) to the primary terminal (31) of the second switch (3). At least one of the first circuit (71) and the second circuit (72) is preferably housed in a box (1;80).

[0074] In the wiring device (A1;A2) according to the eighth embodiment, at least one of the first circuit (71) and the second circuit (72) is housed in a box (1;80), eliminating the need to house either the first circuit (71) or the second circuit (72) in the box (1;80) at the construction site. As a result, the wiring device (A1;A2) according to the eighth embodiment can further improve the workability of the construction work.

[0075] A wiring device (A1;A2) according to the ninth aspect of this disclosure can be realized in combination with the eighth aspect. In the wiring device (A1;A2) according to the ninth aspect, it is preferable that the first circuit (71) and the second circuit (72) are housed in a box (1;80).

[0076] In the wiring device (A1;A2) according to the ninth embodiment, the first circuit (71) and the second circuit (72) are housed in a box (1;80), eliminating the need to house the first circuit (71) and the second circuit (72) in the box (1;80) at the construction site. As a result, the wiring device (A1;A2) according to the ninth embodiment can further improve the workability of the construction work.

[0077] A wiring device (A1; A2) according to a tenth aspect of the present disclosure can be realized in combination with a fifth aspect. The wiring device (A1; A2) according to the tenth aspect preferably further comprises a first circuit (71), a second circuit (72), and a third circuit (73). The first circuit (71) preferably electrically connects the secondary terminal (22) of the first switch (2) to a terminal block. The second circuit (72) preferably electrically connects the secondary terminal (22) of the first switch (2) to the primary terminal (31) of the second switch (3). The third circuit (73) preferably electrically connects the secondary terminal (32) of the second switch (3) to another terminal block. It is preferable that at least one of the first circuit (71), the second circuit (72), and the third circuit (73) is housed in a box (1;80).

[0078] The wiring device (A1;A2) according to the tenth embodiment eliminates the need to house the first circuit (71), the second circuit (72), or the third circuit (73) in a box (1;80) at the construction site, thereby further improving the work efficiency of the construction work.

[0079] Wiring devices (A1;A2) according to the eleventh aspect of this disclosure can be realized in combination with the tenth aspect. In the wiring devices (A1;A2) according to the eleventh aspect, it is preferable that the first circuit (71), the second circuit (72), and the third circuit (73) are housed in a box (1;80).

[0080] The wiring device (A1;A2) according to the 11th embodiment eliminates the need to house the first circuit (71), the second circuit (72), and the third circuit (73) in boxes (1;80) at the construction site, thereby further improving the work efficiency of the construction work.

[0081] A wiring device (A1; A2) according to a twelfth aspect of the present disclosure can be realized in combination with a sixth aspect. The wiring device (A1; A2) according to the twelfth aspect preferably further comprises a first circuit (71), a second circuit (72), and a fourth circuit (74). The first circuit (71) preferably electrically connects the secondary terminal (22) of the first switch (2) to the terminal block. The second circuit (72) preferably electrically connects the secondary terminal (22) of the first switch (2) to the primary terminal (31) of the second switch (3). The fourth circuit (74) preferably electrically connects the surge arrester (6) to the secondary terminal (32) of the second switch (3). It is preferable that at least one of the first circuit (71), the second circuit (72), and the fourth circuit (74) is housed in a box (1;80).

[0082] The wiring device (A1;A2) according to the 12th embodiment eliminates the need to house the first circuit (71), the second circuit (72), or the fourth circuit (74) in a box (1;80) at the construction site, thereby further improving the work efficiency of the construction work.

[0083] A wiring device (A1;A2) according to a thirteenth aspect of this disclosure can be realized in combination with a twelfth aspect. In the wiring device (A1;A2) according to the thirteenth aspect, it is preferable that the first circuit (71), the second circuit (72), and the fourth circuit (74) are housed in a box (1;80).

[0084] The wiring device (A1;A2) according to the 13th embodiment eliminates the need to house the first circuit (71), the second circuit (72), and the fourth circuit (74) in boxes (1;80) at the construction site, thereby further improving the work efficiency of the construction work.

[0085] A wiring device (A1;A2) according to a 14th aspect of the present disclosure can be realized in combination with an 11th aspect. Preferably, the wiring device (A1;A2) according to the 14th aspect further comprises a surge arrester (6) housed in a box (1;80) and a fourth circuit (74) that electrically connects the surge arrester (6) to the secondary terminal (32) of a second switch (3). Preferably, the fourth circuit (74) is housed in a box (1;80).

[0086] In the wiring device (A1;A2) according to the 14th embodiment, the fourth circuit (74) is housed in a box (1;80), eliminating the need to house the fourth circuit (74) in the box (1;80) at the construction site, and as a result, the work efficiency of the construction work can be further improved.

[0087] A wiring device (A1;A2) according to the 15th aspect of this disclosure can be realized in combination with any of the 1st to 14th aspects. In the wiring device (A1;A2) according to the 15th aspect, the box (1;80) is preferably formed in a box shape with an open front and installed on the roof side of a building. The bottom surface of the box (1;80) preferably has one or more cable insertion holes (first entry port 11, third entry port 13) through which electrical cables (first trunk line X1, third trunk line X3) are inserted.

[0088] The wiring device (A1;A2) according to the 15th embodiment can prevent rainwater from entering the box (1;80) via the electrical cables by drawing the electrical cables in from the bottom surface of the box (1;80).

[0089] A wiring device (A1;A2) according to a sixteenth aspect of the present disclosure can be realized in combination with any of the first to fifteenth aspects. In the wiring device (A1;A2) according to the sixteenth aspect, the box (1;80) is preferably formed in a box shape with an open front. The wiring device (A1;A2) according to the sixteenth aspect further preferably comprises a door (84) that can be opened to close the front of the box (1;80). The door (84) is preferably formed so that at least a portion of the first switch (2) and the second switch (3) is visible when the front of the box (1;80) is closed.

[0090] The wiring device (A1;A2) according to the 16th embodiment allows the status of the first switch (2) and the second switch (3) housed in the box (1;80) to be visually observed through the door (84), thereby improving convenience. [Explanation of symbols]

[0091] A1 Wiring device 1 box 2. First switch 3. Second switch 4 1st terminal block (terminal block) 5. Second terminal block (another terminal block) 6 Lightning arrester 11. First entry point (cable insertion hole) 12 Second entrance 13. Third entry point (cable insertion hole) 21 Primary side terminal 22 Secondary side terminal 31 Primary side terminal 32 Secondary side terminal 44 Display Member 71 First circuit 72 Second circuit 73 Third circuit 74. The fourth circuit 80 boxes 84 Doors C1 Charger (Electrical Equipment) X1 First main line (electrical cable) X2 Second main line X3 Third main line (electrical cable)

Claims

1. A first switch having a primary side terminal to which the first main line is electrically connected, A second switch having a primary terminal electrically connected to the secondary terminal of the first switch, A terminal block electrically connected to the secondary terminal of the first switch, A box housing the first switch, the second switch, and the terminal block, Equipped with, The aforementioned box is A first access port for bringing in the first main line, A second entry point for drawing in a second main line that is electrically connected to the terminal block, It has, The second switch is housed in the box so as to be adjacent to the terminal block with the first switch in between. Wiring device.

2. The box is formed in the shape of a box with an open front, The terminal block is provided with a display member at a position facing the front of the box. The display member is marked with letters or symbols that identify the type of equipment to be electrically connected to the terminal block via the second main line. Wiring device according to claim 1.

3. The rated capacity of the terminal block is equal to or greater than the rated capacity of the first switch. Wiring device according to claim 1 or 2.

4. Further comprising another terminal block electrically connected to the secondary terminal of the second switch, The aforementioned other terminal block is housed in the box, Wiring device according to any one of claims 1 to 3.

5. The box further comprises a surge arrester housed within the box, The surge arrester protects the electrical equipment connected to the secondary terminal of the second switch. Wiring device according to any one of claims 1 to 4.

6. The box further comprises a surge arrester housed in the box and electrically connected to the secondary terminal of the second switch, The surge arrester is grounded via the other terminal block. Wiring device according to claim 4.

7. A first circuit that electrically connects the secondary terminal of the first switch and the terminal block, A second circuit electrically connects the secondary terminal of the first switch and the primary terminal of the second switch, Furthermore, At least one of the first circuit and the second circuit is housed in the box. Wiring device according to any one of claims 1 to 6.

8. The first circuit and the second circuit are housed in the box. Wiring device according to claim 7.

9. A first circuit that electrically connects the secondary terminal of the first switch and the terminal block, A second circuit electrically connects the secondary terminal of the first switch and the primary terminal of the second switch, A third circuit electrically connects the secondary terminal of the second switch and the other terminal block, Furthermore, At least one of the first circuit, the second circuit, and the third circuit is housed in the box. Wiring device according to claim 4.

10. The first circuit, the second circuit and the third circuit are housed in the box. Wiring device according to claim 9.

11. A first circuit that electrically connects the secondary terminal of the first switch and the terminal block, A second circuit electrically connects the secondary terminal of the first switch and the primary terminal of the second switch, A fourth circuit electrically connects the surge arrester and the secondary terminal of the second switch, Furthermore, At least one of the first circuit, the second circuit, and the fourth circuit is housed in the box. Wiring device according to claim 5.

12. The first circuit, the second circuit and the fourth circuit are housed in the box. Wiring device according to claim 11.

13. A surge arrester housed in the box, A fourth circuit electrically connects the surge arrester and the secondary terminal of the second switch, Furthermore, The fourth circuit is housed in the box. Wiring device according to claim 10.

14. The box is formed in the shape of a box with an open front and is installed on the roof side of the building. The bottom surface of the box has one or more cable insertion holes through which electrical cables are inserted. Wiring device according to any one of claims 1 to 13.

15. The box is formed in the shape of a box with an open front, The box further comprises a door that can be opened to close the front of the box, The door is formed so that at least a portion of the first switch and the second switch are visible when the front of the box is closed. Wiring device according to any one of claims 1 to 14.

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