PTS - IC Lesson 23 Questions and Answers

PTS - IC Lesson 23 Questions and Answers When the grounded conductor is to be spliced in a 12-inch by 12-inch junction box, there shall be at least ? of free conductor left for splicing. 6" (NEC 300.14) When an outlet supplied through an underfloor raceway is removed, the sections of the circuit conductors supplying the outlet shall be removed from the raceway. True (NEC 390.57) A 4,160-volt feeder is to be installed in a nonmetallic conduit identified for direct burial without concrete encasement. The minimum covering for the nonmetallic conduit is ?. 18" (NEC 305.15, Table 305.15(A)) Type SE service-entrance cable shall be permitted where the insulated conductors are used for circuit wiring and the uninsulated conductor is used only for equipment grounding purposes. True (NEC 338.10(B)(2)) The radius of a bend in Type MI cable with an overall diameter of 1/2 inch shall not be less than five times the external diameter of the cable measured ?. to the inner edge of the bend (NEC 332.24, 332.24(1)) Metal-clad cable shall be supported at intervals not to exceed ?. 6' (NEC 330.30(C)) Type MI cable is required to be strapped at intervals not exceeding ?. 6' (NEC 332.30, 332.30(A)) In an installation of Type NM cable, the 90°C conductor ampacity rating shall be permitted to be used for ampacity adjustment and correction calculations, provided that the final calculated ampacity does not exceed that for a 60°C-rated conductor. True (NEC 334.80) Which Chapter 3 article provides general requirements for wiring methods and materials? Article 300 Which Chapter 3 article covers requirements for cabinets, cutout boxes, and meter socket enclosures? Article 312 Which Chapter 3 article covers the requirements for electrical metallic tubing? Article 358 Locations protected from weather and not subject to saturation with water or other liquids but subject to moderate degrees of moisture are defined as ? locations. damp In general, the minimum-size aluminum feeder conductors permitted to be installed in parallel is ?. 1/0 AWG (NEC 310.10(G)(1), 310.10(G)) The minimum direct-burial depth for rigid metal conduit containing a 480-volt circuit not encased in concrete and not subject to vehicular traffic is ?. 6" (NEC Table 300.5(A), 300.5(A))