PoE Cable Gauge and Insulation Design for Extended Reach

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Solution Overview

Problem

Existing Power-Over-Ethernet (POE) cables have a maximum length limitation of 100 meters, requiring the use of boosters or intermediate distribution frames (IDFs) to extend the distance, which increases complexity and cost.

Innovation Solution

A twisted pair cable with 20 AWG solid copper conductors and FEP insulation, designed with a specific lay of twist and RJ-45 style connectors, allowing for extended lengths without the need for boosters or IDFs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of stationary object

If standard Cat 5e or Cat 6 POE cable is used, then the cable can transmit power and data signals, but the maximum length is limited to 100 meters requiring boosters or IDFs

Engineering Contradiction:

Improvecable lengthVSAvoidsystem complexity

Core Design Contradiction:

Length of stationary objectVSDevice complexity

Solution Approach 1:

The patent changes the conductor gauge parameter from standard 24 AWG (Cat 5e) or 23/24 AWG (Cat 6) to 20 AWG solid copper conductors. This parameter change reduces resistance and enables extended cable lengths of at least 292 meters without requiring boosters or intermediate distribution frames, thereby resolving the contradiction between cable length and system complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite construction with 20 AWG solid copper conductors combined with FEP (fluorinated ethylene propylene) insulation and overall FEP jacket. This composite material structure provides both the electrical performance needed for extended lengths and the mechanical properties for reliable installation, eliminating the need for additional equipment while maintaining signal integrity

Inventive Principle:

Principle #40Composite materials

2Length of stationary object

If boosters or intermediate distribution frames are added to extend cable length, then the transmission distance can be increased, but the cost and complexity increase

Engineering Contradiction:

Improvecable lengthVSAvoidinstallation cost

Core Design Contradiction:

Length of stationary objectVSEase of manufacture

Solution Approach 1:

By changing the conductor gauge to 20 AWG solid copper, the patent eliminates the need for expensive boosters or intermediate distribution frames. The extended reach of at least 292 meters is achieved through this single parameter change, reducing both equipment costs and installation complexity while maintaining full resolution 1080p video transmission at 30 fps

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent extracts and eliminates the need for intermediate equipment (boosters and IDFs) by using 20 AWG conductors that can transmit signals over extended distances without additional active components. This removal of unnecessary equipment simplifies the system and reduces overall cost while achieving the desired extended cable length

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20250125069A1Cable for power-over-ethernet having an extended usable length

Publication Date: 2025.04.17 PAIGE ELECTRIC CO LP

AI summary

A method of extending the usable length of a power-over-ethernet cable includes the steps of providing twisted pairs of wires with the conductor of each wire being a 20 AWG or 22 AWG conductor and terminating the cable at an RJ-45 style connector. The connector for the 20 AWG conductors has an insert therein with holes that can accommodate 20 AWG conductors. FEP, PVC or PP insulation may surround each conductor.