Boxes and Wiring Devices

This chapter covers various types of boxes, cabinets, wiring devices, and the appropriate fasteners and hangers to secure each. Descriptions, units of measure, material and labor requirements, and a takeoff procedure are suggested for each. Boxes and cabinets are usually made of galvanized steel, epoxy‐painted steel, stainless steel, aluminum, or high‐density plastic and frequently include covers. Wiring devices include receptacles, wall switches, pilot lights, and their respective cover plates. Low‐voltage switching includes the preceding plus relays, transformers, rectifiers, and controls. Fasteners include various types of anchors, bolts, screws, nails, rivets, and studs. Fasteners will vary based on the application, condition, and composition of the surface. Hangers can be grouped into two distinct categories–those that are shop manufactured and those that are field fabricated. Manufactured hangers are designed to support by attaching to an existing building structure without modification.