131

Article ___ in the NEC® covers grounding and bonding of electrical systems.

250

Article ___ of the NEC® covers the requirements that establish a grounding electrode system.

250 Part III

According to NEC® Section ___, when a single equipment grounding conductor is run with multiple circuits in the same raceway or cable, it shall be sized for the largest overcurrent device protecting conductors in the raceway or cable.

250.122

When determining the minimum size of a grounding electrode conductor, Table ___ is used.

250.66

If connected to a metal water piping system, the grounding electrode conductor shall be connected at some point within the first ___ of where it enters the building.

5 ft (1.52 m)

Where connected to a rod, pipe, or plate grounding electrode, the largest required size of the grounding electrode conductor is ___ AWG copper.

6

A terminal lug on a neutral bar is to be torqued to 110 in-lbs, but your torque wrench is calibrated in foot-pounds. You would set your wrench at ___ ft.-lb.

9.2

If the manufacturer specifies that a terminal lug be torqued to 7.5 foot-lbs but your torque wrench is calibrated in inch-pounds, you would set your wrench at ___ in.-lb.

90

A(n) ___ AWG grounding electrode conductor is required to be installed in cable armor or conduit when it is NOT subject to physical damage such as where installed behind a flower bed. I. 8 II. 4 III. 3/0

I only

The main bonding jumper (a green bonding screw, for example) that is shipped with and installed in a 120/240-volt, single-phase circuit-breaker panel at the service connects (bonds) the ___ to the metal panel enclosure. I. branch-circuit neutrals II. branch-circuit "hots"

I only

Which of these grounding electrode conductors requires protection? The conductors are subject to physical damage. I. 8 AWG II. 6 AWG III. 4 AWG IV. 2 AWG

I, II, III & IV

Refer to Figure 131.202. The tool(s) shown at ___ can be used to cut 500 kcmil THHN/THWN copper conductors without damaging the tool.

II or III only

Which of the tools shown in Figure 131.201 would be used to screw together PVC-coated steel conduits?

II. strap wrench

Electrical equipment is bonded in order to ___.

all of these

Electrical systems that are required to be grounded are connected to earth in a manner that will limit the voltage imposed by ___.

all of these

Self-tapping sheet metal screws (TEK screws) ___ permitted to be used to connect the equipment grounding conductor to a metal box.

are not

The tool shown at III in Figure 131.201 is a ___.

chain wrench

The grounding electrode conductor shall be ___.

copper, aluminum, or copper-clad aluminum

The tool shown at II in Figure 131.202 can be used to cut triplex.

false

An equipment bonding jumper (BJ) is the connection between two or more portions of the ___ conductor.

ground clamp

The drawing shown here is a ___.

ground clamp

According to Article 250, a metal underground water pipe that is in direct contact with the earth for 10 ft. or more (including any metal well casing effectively bonded to the pipe) and electrically continuous (or made electrically continuous by bonding around insulating joints or insulating pipe) to the points of connection of the grounding electrode conductor and the bonding conductors would be a good ___.

grounding electrode

An equipment grounding conductor (EGC) is the conductor that is ___.

installed with the branch-circuit conductors in a conduit or cable run

Not more than one conductor shall be connected to the grounding electrode by a single clamp or fitting unless the clamp or fitting is ___.

listed for multiple conductors

The grounding blade on an attachment plug is ___ than the current-carrying conductor blades. This is to ensure that the grounding connection is made before the current-carrying conductor connections and breaks its connection after the current-carrying conductor connections (first make-last break).

longer

Green main bonding jumper screws that are furnished with residential type panels should be installed in ___.

main panels only

The tool shown at I in Figure 131.201 is a ___.

pipe wrench

The tool shown at V in Figure 131.201 is a ___.

ratchet threader

If likely to become energized, interior metal natural gas piping ___ required to be bonded in accordance with NEC® Section 250.104(B).

shall be

To minimize conductor insulation damage and arcing damage to electrical equipment during a ground fault or a short circuit, ___ should be minimized.

time duration of the fault