A-A-50563 Conduit Outlet Boxes, Bodies, and Entrance Caps, Electrical: Cast MetalThis commercial item description CID establishes the government acquisition requirements for cast metal conduit outlet boxes, bodies, and entrance caps for use with threaded and threadless rigid conduit, intermediate metallic conduit, and electrical metallic conduit. Outlet boxes may be used as wire outlets or as mountings for lamp holders, rosettes, switches, convenience outlets, to enclose wire splices, for mounting or enclosing surface wiring offsets, pull boxes, and other functions in conduit runs. Entrance caps provide a weather resistant service entrance for wires.

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A-A-50563B

2.5 Hub sizes. Hub sizes are related to type, design form, and style. Conduit hub sizes shall be one of the sizes listed in table IV.

TABLE IV. Hub sizes.

Size code	Dimension
A	1/2-inch (1.3 cm)
B	3/4-inch (1.9 cm)
C	1-inch (2.5 cm)
D	1 1/4-inches (3.2 cm)
E	1 1/2-inches (3.8 cm)
F	2-inches (5.1 cm)
G	2 1/2-inches (6.4 cm)
H	3-inches (7.6 cm)
J	3 1/2-inches (8.9 cm)
K	4-inches (10.2 cm)
L	5-inches (12.7 cm)
M	6-inches (15.2 cm)

3. SALIENT CHARACTERISTICS

3.1 Description. Conduit outlet boxes, bodies, and entrance caps shall consist of a cast metal body, a wiring chamber, and an access opening to the wiring chamber. All types shall have integral conduit hubs. Each hub shall have an integral end stop for the conduit or tubing, and shall provide a smooth, well rounded opening into the wiring chamber. Boxes without integral conduit hubs or end stops shall provide adequate room for the installation of a bushing.

3.2 Identical items. Conduit outlet boxes, bodies, and entrance caps of the same classification furnished under any specific contract shall be physically and mechanically identical. This requirement includes parts, assemblies, components, and accessories. No deviation will be acceptable without prior written approval of the contracting officer.

3.3 Design. Conduit outlet boxes, bodies, and entrance caps shall conform to Underwriters Laboratories (UL) 514, "Fittings for Cable and Conduit" (DoD adopted). In addition to complying with UL 514, type V outlet boxes shall comply with the applicable requirements of UL 1203, "Standard for Safety for Explosion-Proof and Dust-Ignition-Proof Electrical

Equipment for Use in Hazardous (Classified) Locations", covering installation in class I, division

1, groups C and D, and class II, division 1, groups E, F, and G locations as defined in National

Fire Protection Association (NFPA) 70, "National Electrical Code" (DoD adopted).

3.4 Materials. Materials used shall be free from defects that would adversely affect the performance or maintainability of individual components or of the overall assembly.

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