Electrical 2: Boxes and Fittings

Describe different types of boxes that are used in electrical installations and typical applications for which each type is appropriate. Describe how to properly size outlet boxes pull boxes and junction boxes. Describe concerns that are associated with installing pull boxes and junction boxes. Describe types of couplings that are used to connect different types of conduit in electrical installations. Describe different types of locknuts and bushings that are used in electrical installations. Describe what seal-off fittings are and explain how they are installed. Describe environmental conditions and equipment requirements that are associated with installing boxes and fittings in damp or wet locations. Describe the conditions that make an area a hazardous location for electrical installations. Describe the three classes of hazardous locations that are identified in the NEC. Describe requirements for safely installing boxes and fittings in hazardous locations.