A general term that includes materials,fittings devices, appliances, and fixtures that are used as a part of, or in connection with, an electrical installation.
A fitting or box connects the conduit or nonmetallic wire sections and physically holds those parts of the wiring. They can be grounded, but they don't normally conduct any current in the electric circuit.
Devices
The materials that are used to conduct or interrupt electricity
devices
Load
uses electricity to perform a function
Safety standards for electrical equipment and materials are necessary to protect not only the public, but also those who manufacture and install the equipment. The standards include specifications that cover the main features of various products with regard to safety and durability.
National Electrical Manufacturers Association (NEMA)
Certified Ballast Manufacturers (CBM)
Underwriters' Laboratories, Inc. (UL)
National Electrical Code (NEC)
