The cabinet or specially designed box in which electrical controls and apparatus are housed. It is required by the National Electrical Code (NECⁱ) to protect persons from live electrical parts and limit access to only authorized personnel. It also provides mechanical and environmental protection. An enclosure should be designed to provide the required protection and sized to provide good, safe wire access and replacement of components. It can be manufactured of steel, galvanized or stainless steel, aluminum, or suitable non-metallic materials including fiberglass.