NEC Quiz Questions

Where an AC system operating at less than ________volts is grounded at any point , the grounded conductor shall be run to each service.

1000 Volts, Article 250.24C

The maximum height, to the center of the grip of the operating handle, of a circuit breaker installed in a panelboard shall not exceed____ above the floor or working platform.

6Ft7Inches, Article 240.24A

The minimum size underground service-lateral conductors shall not be smaller than_______Copper______Aluminum.

8 Awg, 6 Awg, Article 230.31B

Service disconnecting means shall not be installed in____?

Bathrooms, Exposed to physical Damage, Easily ignitable material, Over Steps, Article 240.24 C-F

A grounding electrode conductor shall not be required for a __________system that supplies a circuit and is derived from a transformer not more than 1000 VA

Class 1, Article 250.30A1

The disconnecting means of a service shall be______?

Readily Accessible Article 230.70A1

Which of the following wiring methods is permitted by the NEC for the service-entrance conductors for residences

Rigid PVC, Article 230.43

Where used as switches in 120-volt and 277-volt fluorescent lighting circuits,d circuit breakers shall be marked____?

SWD, Article 240.83D

Service conductors are the conductors from the service point to the_____?

Service disconnecting means Article 100

The enclosure for a panelboard shall have the top and bottom wire-bending space sized in accordance with_____ for the largest conductor entering or leaving the enclosure.

Table 32.6(B)

Where individual open conductors are exposed to the_____ conductors shall be mounted on insulators or on insulating supports attached to racks, brackets, or other approved means.

Weather, 230.51C

Plate electrodes of non ferrous metal shall be at least______ in thickness.

.06" Article 250.52A7

A cabinet or cutout box is constructed of sheet steel, the metal thickness shall not be less than _____inch uncoated

0.053" Article 314.40C

Overhead conductors to a building shall maintain a vertical clearance of____ feet above platforms projections, or surfaces from which they might be reached.

10FT, Article 225.15(1)

Plug fuses and fuse holders can be used in circuits supplied by a system having a grounded neutral point having no conductor at over_____ volts to ground

150 Volt Article 240.50A2

Grounding electrodes made of pipe or conduit shall not be smaller than trade size____?

3/4", Article 250.52(5)A

Dry type transformer installed indoors rated over____ shall be installed in a vault.

35K, 450.21C

Live parts of generators operated at more than____ volts to ground shall not be exposed to accidental contact where accessible to unqualified persons.

50 Volts

What is the minimum size copper conductor that may be used for an overhead feeder which is 35 feet in length from a residence to a remote garage?

8 Awg, Article 225.6A1

Circuit breakers shall not be located in the vicinity of easily ignitable material, such as in___?

Clothes Closets Article 240.24D

Circuit breakers shall be marked with their ampere rating in a manner that will be after installation

Durable and Visible, Article 240.83A

Where necessary to prevent _____an automatic overcurrent device protecting service conductors supplying only a specific load, such as a water heater, shall be permitted to be locked or sealed where located so as to be accessible.

Tampering, Article 230.93