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26 Cards in this Set
- Front
- Back
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Conductor sizes Up Grill 4/0 AWG are expressed in American wire gauge. Conductor sizes larger than 4/0 AWG are expressed in _____? |
Kcmil |
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The smallest wire size for a residential home for which overcurrent protection is specified in the code is ____ |
14 AWG |
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The NEC requires that conductors 8 AWG and larger must be ____ when installed in a Raceway. |
Standard |
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branch circuit conductors shall have an ampacity ___ the maximum to be served |
Not less than |
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Older electrical books and plans sometimes use the term MCM which means the same thing as ____? |
Kcmil |
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The rating of a branch circuit is determined by its ____. |
Overcurrent protection device |
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The total rating of utilization equipment fastened in place , Lumineers shall not exceed ____ percent of the branch circuit Ampere rating , where lighting unit , cord and plug connected equipment fastened in place , or both are also supplied. |
50 |
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For a given conductor size , which material has the greatest ampacity? |
Copper |
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Conductors marked ____ are suitable for use with aluminum , copper or copper clad conductors. Conductors not so mark are for use with copper conductors only. |
AL/CU |
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Cable 310. B2 a Gibbs allowable ampacities of copper conductors with various types of installation. When conductors ambient temperatures exceeding 30° Celsius, the ____ for the table must be applied. |
Correction factors |
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Article 210 applies to Branch circuits , but branch circuit calculation are covered in |
Article 220 |
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Under certain circumstances grounded conductors of a residential service ____ permitted to be size smaller than the phase conductors |
Are |
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Low voltage in a home can be caused by |
A conductor is too small for the load, A circuit that is too long, Poor connection at the terminal |
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Type NM cable can be run in all of the following locations except for |
Exterior masonry block or tile walls |
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When a 4-foot piece of nonmetallic sheathed cable is used as a fixture whip above and accessible ceiling it ____ |
Is not required to be secured, Maybe up to six foot in length, Is required to be plenum rated |
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The ampacity type NM cable shall be in accordance with ____ conductors temperature rating |
60° Celsius |
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Type AC cable is manufactured with ____ space conductors |
All of these |
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The National Electric Code allows rigid PVC conduit to do all of the following except for |
Support lighting fixtures |
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Liquid tight flexible nonmetallic conduit is subject to the following limitations? |
Cannot be used in direct sunlight unless marked for this application, Can become brittle in extreme cold temperatures |
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A dual rated conductor mark THHN / THWN is rated ____ when used in dry locations |
90° Celsius |
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A a subfix B in type NM-B nonmetallic cable means that the conductors have an insulation temperature rating |
90° Celsius |
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When using individual conductors in Raceway, all of the following colors of insulation are permitted to be used for the neutral conductor except for |
Green with three white stripes |
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Phase conductors 6 AWG and smaller ____ permitted to be identified as equipment ground conductors using green paint, tape, or other effective means |
Are not |
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Alternating current General use snap switches are UL listed to control Motors rated up to ____ horsepower |
Two |
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The NEC requires that switching be done only in ____ conductors. |
Underground |
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Snap switches with non-metallic yoke have a terminal for the equipment grounding conductor. Using this type of switch provides a means for grounding ____ Face Place when nonmetallic boxes are used |
Metal |
