Question

13. Type SE-R Service-Entrance Cable with three insulated conductors and a bare equipment grounding conductor contained within the outer nonmetallic sheath is used as a feeder to provide power from the service panel to a panelboard located in another part of the building as shown in Figure 1.44. The cable run along the flat surface of structural materials is required to be supported at intervals not to exceed: A 6 ft (1.8m). B. 41/2ft(1.4m). C 3 ft (900 mm) D. 24 in. (600 mm) E. 12 in. (300 mm). Code reference 14. The National Electrical Code9 does not apply to wiring installations in: A underground mines. D. recreational vehicles. B. floating buildings. C. carnivals. E. public buildings. Code reference 15. Type UF Cable is installed as surface wiring in a building where damp conditions are likely to exist. The cable is used with nonmetallic boxes and fittings that prevent the entrance of moisture. The cable is required to be supported at intervals not to exceed: A. 10 ft (3m). B. 6 ft (1.8m). C. 4 1/2ft(1.4m). D. 3 ft (900 mm). E. 24 in. (600 mm). Code reference-

Answer 1

Ans 13: (B)

The required interval that is not to be exceeded is 4.1/2 feet or 1.4m.

Code reference is 320.15.

Ans 14: (A)

The national electrical code does not apply to wire installation in underground mines railways, ships.

The code reference is 90.2 which state the scope of National electrical code.

Ans 15: (A)

The cable is required to be supported at intervals not exceeding to 10ft or 3m.

Code reference: 376 and 378