) of free conductor, measured from the point in the box where it emerges from its raceway or cable sheath, shall be left at each outlet, junction, and switch point for splices or the connection of luminaires or devices. Where the opening to an outlet, junction, or switch point. The length of wire left inside an electrical box is a matter of strict compliance, safety, and functionality. Having the correct amount of slack ensures that future maintenance, repairs, or device replacements can be performed without difficulty. Note, in Fig 2 below, the diverse range of conductor termi ations even before meter tails tgoing terminal of RCD and supply side of circuit-br egular checks of their accuracy and rec Fig 4 nsulat on - many cable strippers have an.