When building the wall, the reserved hole shall be about 20mm larger than the length and width of the distribution box. 1)The distribution box shall be installed in a concealed way. However, the key to a safe and reliable system lies in proper installation. If it's done poorly, you risk short circuits, fire hazards, or system failure. Done right, it ensures. rolling the L. 63 VA V 8623 (amended upto date) – for general requirement of me d upto date) – Glass Reinforced in ion arrangement etc le pole Isolator (Switch Disconnector), conforming to. The invention discloses a construction method of a reserved line hole of a distribution box slot, which comprises the following steps: s1, placing the prefabricated part at a preset position when building a wall; s2, building a brick body along the periphery of the prefabricated member to support. The ideal location to install electrical distribution boxes should keep a distance from water, flammable and explosive substances and corrosive substances. If necessary, equipping a rain cover. The installation requirements and specifications of Distribution box involve many aspects, including site selection, fixing method, wiring specifications and safety protection.