A component having a
bus termination. A component (3, 4, 7-9, 13, 27) for a
combustion appliance, such as an appliance having a boiler, the component (3, 4, 7-9, 13, 27) comprising an outer surface and a tangible electrical interface (30, 32, 35, 36) configured to be electrically connected by a user such that the tangible electrical interface (30, 32, 35, 36) is in a
short circuit condition, the tangible electrical interface (30, 32, 35, 36) is electrically disconnected by the user such that the tangible electrical interface (30, 32, 35, 36) is in an open condition; wherein the tangible electrical interface (30, 32, 35, 36) is arranged on an outer surface of the component (3, 4, 7-9, 13, 27) such that the tangible electrical interface (30, 32, 35, 36) is accessible to the user; the components (3, 4, 7-9, 13, 27) comprise a first and a second
bus wire.