1 When computing box fill, all internal clamps count as _ conductor(s) of the largest conductor in the box. 1 When computing box fill, three ground wires are counted as _ conductor(s) of the largest conductor in the box. 2 When computing box fill, a duplex receptacle is counted as _ conductors of the size conductor attached to it. keyhole A _ saw is used to cut holes in lath and plaster or sheetrock walls when installing old 1 Each unspliced conductor that is less than 12" long running through a box is counted as Structure or finish or not permanently closed in by the structure or finish of the building. What is the minimum size 4" square box you could use? Accessible _ means capable of being removed or exposed without damaging the building What is the minimum size metal device box you could use? 4 x 2 1/8 A metal 4" square box has ten 12 AWG conductors, four 12 AWG grounding conductors, and four externalĬlamps. What is the maximum number ofġ4 AWG conductors it can hold? 3 x 2 x 2 1/2 A metal device box has two 14 AWG conductors, one 14 AWG grounding conductor, two internal clamps,Īnd a duplex receptacle. 12 A plastic nail-on single-gang device box has a volume of 24 cubic inches. 10 A 4" x 1 1/2" square box can hold a maximum of _ 14 AWG conductors. 8 A 3" x 2" 3 1/2" metal device box can hold a maximum of _ 12 AWG conductors. Without splice or connection, the volume allowance is _ of the actual conductor size. Raised plaster ring with a marked volume of 4.5 cubic inches attached to it is: 2 For each looped or coiled, unbroken length of conductor at least 12" long which passes through a box 25.5 cubic inches The actual volume for a 4" x 1 1/2" square box with a 21 cubic inch volume with a single gang 4" x 3/4" 10.75 When computing box fill, 3 - 12 AWG conductors and 2 - 14 AWG conductors would total _Ĭubic inches. Table 314.16(A) In which of the following NEC Tables would you find information on box fill? 2.25 When computing box fill for a box that has more than one size of conductor in it, a 12 AWG conductorĬounts as _ cubic inches. 3" x 2" The size of the opening of a standard metal device box used to mount a switch or receptacle in a wall is 35 Ceiling suspended paddle fans that weigh more than _ pounds may be supported by an outlet boxĪs long as the box has the maximum weight it can support marked on it. 50 Lighting fixtures that weigh more than _ pounds must be supported independently of the deviceīox.
Round Nonmetallic electrical boxes used for lighting outlets in residential wiring are _.
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