16.a. When conductors enter device boxes, a conductor-free length of _______ inches must be allowed from the point it enters the box to the end of the conductor. A. 4 B. 10 C. 6 D. 8 16.b. Metal elbows installed in nonmetallic raceways aren't required to be connected to the grounded system or electrode conductor when they're at least _______ inches below grade. A. 18 B. 24 C. 36 D. 12

Connectors marked ____ are suitable for use with aluminum, copper, or copper-clad conductors?    1. CO-ALR only   2. AL/CU only   3. UL 9   4. CO-ALR and AL/CU   What is the correct answer? Why?

1. A14/2 type copper used for a general lighting branch circuit.                                                Ampacity:______________              Maximum Fuse or Circuit Breakers Sizes:________________      2.Three 8 AWG copper conductors with THHN insulation Installed in garage in electrical metallic tubing (EMT). The ambient temperature in the garage can reach as high as 110'F. All termination points for this circuit are rated 60'C.                            Ampacity:______________                  Maximum Fuse or Circuit Breakers Sizes:________________ 3.Four 4 AWG copper conductor with THWN insulation imstalled in EMT in a basement. All termination points are rated at 60'C.                                 Ampacity:______________                  Maximum Fuse or Circuit Breakers Sizes:________________  4. An 8/3 Type UF copper cable installed underground from a house to a detached garage to feed a 120/240-volt subpanel. All termination points are rated at 60'C.…

16. Flexible metal conduit will be installed between a raceway and a transformer in a system. If it's to serve as an equipment grounding conductor, the flexible conduit and its fittings must be less than _______ feet. A. 2 B. 6 C. 10 D. 4 17. In which of the following situations can an equipment ground conductor be run separately from the circuit conductors? A. When you install a GFCI and are connecting additional receptaclesB. When the connection is to be made to a nearby water pipeC. When you're replacing an ungrounded two-wire receptacle with a grounded receptacle D. When there are no spare conductors in the cable 18. A 400-amp circuit breaker protects a feeder that's installed in a nonmetallic raceway that requires an equipment grounding conductor. Which of the following is the minimum size of aluminum equipment grounding conductor that should be used in this situation? A. No. 4B. No. 1C. No. 6 D. No. 2 19. Which of the following is bonded to the grounding electrode system…

16. The primary purposes of insulation shielding are to confine voltage stresses to the ?, dissipate insulation leakage current, drain off capacitive current, and carry ground fault current to facilitate operation of the ground- fault protective devices. Oa. cable outer sheath Ob. circuit Oc. conductor Od. insulation

What is the required size of THHN copper conductors for a feeder serving two 208Y/120V, four-wire, three-phase, 75 degrees Celsius branch circuit panelboards, one with a continuous load of 150A and the other a noncontinuous load of 180A

How many 14 AWG THHN conductors, including an equipment grounding conductor, can be installed in a 3/8-in. flexible metal conduit using inside fittings? Select one: A. 2 B. 6 C. 4 D. 8

28. A multiwire circuit must consist of conductors connected to ____. Select one: A. THE SAME PHASES B. DIFFERENT BRANCHES C. THE SAME BRANCH D. DIFFERENT PHASES

The voltage drop percentage for a panel feeder with a no continuous load of 180A, using 3/0 THWN copper conductors at 480V, three-phase, and a length of 248' is

3.a. There may be installations where grounded conductors of different systems are installed within the sameraceway, cable, or box. In these cases, it's imperative that the system-grounded conductors remainA. spliced.B. disconnected.C. separated.D. buried.3.b. In dwelling units, the maximum allowable voltage between conductors that supply lighting fixtures isA. 220 V.B. 120 V.C. 115 V.D. 110 V.