The wire inlets and outlets in the distribution box and switch box shall be set at the lower bottom of the box. Article 314 applies to: These. The National Electrical Code (NEC) governs electrical junction box rules. These rules define when you must install a box, how large it must be, how you must install it, and how inspectors evaluate compliance. When choosing one, check the IP or NEMA rating. The box is usually made of steel or plastic. NEC Article 408 covers switchboards, switchgear, and Panelboards installation and applications. Inside the service housing, line conductors from the utility feed typically enter through the top and connect directly to dual-lug terminals. Below these, neutral and ground pathways are routed to their respective bus bars, clearly separated to meet code requirements in subpanels.
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