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Exam 9: Services and Electrical Equipment

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Question 1

Multiple Choice

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Overhead service conductors, accessible only to pedestrian traffic, must have a minimum ____-ft vertical clearance above finished grade.

A) 6
B) 8
C) 10
D) 12

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Question 2

Multiple Choice

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Cartridge fuses and fuseholders are classified according to ____.

A) voltage and amperage ranges
B) ampere ranges and melt-down
C) wattage or heat capacity
D) voltage ranges

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Question 3

Multiple Choice

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Two to ____ circuit breakers or sets of fuses are acceptable as the overcurrent device to provide overload protection.

Underground service conductors are defined as the underground conductors between the service point and the ____ to the service-entrance conductors in a terminal box.

Main bonding jumpers and system bonding jumpers must be made of ____ or other corrosion-resistant material.

Type USE cable used for service laterals can ___.

Although not stipulated in the NEC , some local jurisdictions have adopted ____ for service conductors.

Panelboards include overcurrent devices as well as ____.

Type ____ cable can be formed in a gooseneck and taped with a self-sealing weather-resistant thermoplastic.

Circuit breakers and fuses can be connected in parallel provided they are ____.

Entrance cables must be supported within ____ in. of every raceway or enclosure connection.

Circuit breakers must have a voltage rating (clearly marked) ____ voltage.

Voltage between overhead conductors does not exceed ____ volts.

Panelboards shall be mounted in cabinets, cutout boxes, or identified enclosures and shall be ____.

Splices in wire-type grounding electrode conductors are acceptable only if by means of irreversible compression-type connectors (listed as grounding and bonding equipment) or by the ____.

Fuses must be plainly marked (by printing on or a label attached to the fuse barrel) , showing the following: (1) ampere rating, (2) voltage rating, (3) ____, (4) "current-limiting" where applicable, and (5) the name or trademark of the manufacturer.

Working space illumination shall not be ____.

Conductor sizes are expressed in American Wire Gage (AWG) or in ____.

The radius of the curve of the inner edge of any bend in service-entrance cable must be at least ____ times the diameter of the cable.

Wireways are ____ with hinged or removable covers used to house and protect electric wires and cables.