Choose the right box based on environment (indoor/outdoor), load capacity, and durability. Check for proper IP/NEMA ratings and material quality. 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. In this guide, we'll break down everything you need to know to install. NEC Article 314 establishes requirements for the installation and use of electrical boxes, conduit bodies, fittings, and handhole enclosures. Use of the copyrighted material apart from this UFC must have the permission of the copyright holder. 22 and updated reference to IEEE C57. The National Electrical Code (NEC) requirements might seem like bureaucratic.