Exam 20: Checking Out and Troubleshooting Electrical Wiring Systems

A continuity tester can be used to find short circuits, ground faults, and open circuits in de-energized circuits.

When holes are bored through wood framing members, they must be at least __________ inches from the nearest edge of the wood member.

An electrician tests a three-way switching circuit.The lighting load can be turned OFF and then ON at each of the three-way switch locations.However, when one three-way switch toggle is left in the up position, toggling the other three-way switch does not cause the lighting load to come on.The likely cause is __________.

The rating of the __________ determines the rating of a branch or feeder circuit.

A(n) __________ is a circuit that is energized but does not allow useful current to flow on the circuit because of a break in the current path.

Outdoor receptacles must be installed __________.

NEC Table __________ contains the requirements for direct burial of conductors and raceways.

An electrician is testing a 15-ampere, 125-volt rated duplex receptacle with a voltage tester.The tester indicates 120 volts between the ungrounded slot and the grounded slot.The tester also indicates 120 volts between the grounded slot and the grounding slot.The likely cause is __________.

At least __________ 20-ampere small appliance branch circuits are (is) required to serve kitchen countertop surfaces.

Explain "feed through" as it applies to using a continuity tester when testing a lighting circuit.

The house electrical system may be grounded using a metal water pipe in direct contact with the earth for at least __________ feet.

Recessed lighting fixtures installed in insulated ceilings so that the insulation is covering the fixture must be labeled ____________________.

A feed-though condition may cause false readings during circuit testing and can happen when a load is still connected to the circuit being tested.

A(n) __________ is an unintended low-resistance path through which current flows around, rather than along, a circuit's intended current path.

According to the NEC, lighting fixtures must be installed in clothes closets.

In a sub-panel, a green bonding screw provided by the panel manufacturer must be installed to electrically bond the grounded feeder conductor and the equipment-grounding conductors to the panel enclosure.

When there is a short in a branch circuit, a high circuit resistance develops that results in low amounts of current flowing on the circuit.

Regular fluorescent ballasts are designed to light fluorescent lamps in an ambient temperature of __________ degrees F or higher.

When testing a "live" 50-ampere, 125/250-volt range receptacle using a voltage tester, you should get a 240-volt reading when measuring from the grounded conductor connection (W slot) to either ungrounded conductor connection (X or Y slot).

The NEC requires a minimum of __________-20 ampere bathroom branch circuit in a dwelling unit.