Article 300 ( wiring methods)
Class two
Raceways can be used as a means of support of _____ circuit conductors or cables that connect to the same equipment
6 inches
Rigid metal conduit that is directly buried outdoors so I have _____ at least of cover
Raceway,cable or trench
All conductors of a circuit , including the grounded and equipment grounding conductors, shall be contained within the same ____
Ferrous material
Any enclosures ,raceways ,or equipment made of ______ shall be protected from corrosion.
0 inches
The minimum cover required for direct buried cables ,metal raceways ,and nonmetallic raceways under a building is ____
24 inches
The minimum cover requirement for direct burial type UF cable under 600v, installed outdoors, that supplies a 120 V 30 amp circuit is ____
60% fill
A conduit nipple 24 inches or less is allowed _____
53% fill
A raceway with one conductor is permitted ____
40% fill
A raceway with three or more conductors is permitted _____
31% fill
A raceway with two conductors is permitted ____
Wiring methods
Article 300 pertains to_____ .
1/16 of an inch
Cables laid in wood notches require protection against nails or screws by using a steel plate at least _____ .
1 1/2 inches
Cables or raceways installed on the metal corrugated sheet roof decking , shall be supported to the nearest outside surface of the cable or raceway not less than ____
Insulation rating
Conductors of AC and DC circuits rated 600 V or less can occupy the same raceway provided they all have the same _____
12 inches
Direct buried service conductors that are not encased in concrete , and that are buried 18 inches or more below grade , shall have their location identified by a warning ribbon placed in the trench ___ above the installation
4 feet
Flexible metal conduit in lengths not exceeding ____ can be used to connect equipment inside of fabricated duct (plenum)
Aluminum
In New York City ______ raceways are not allowed to be embedded in concrete or in direct contact with the earth
Grounded
In multi wire branch circuits, the continuity of the ____ conductor shall not be dependent upon the device connections.
Welding
Metal raceways shall not be supported by ____ to the raceway
Flame retardant insulation
The X in wire acronyms stands for ______
wet
The interior of underground raceways ,shall be considered a _____ location.
#10 AWG
The largest solid conductor allowed in a raceway is _____
Heat resistance (167 F)
The letter H in wire acronyms stands for _____
Nylon coated, For resistance to oil and gasoline
The letter N in wire acronyms stands for _____
Rubber ( thermoset)
The letter R inwire acronyms stands for____
Thermoplastic
The letter T in the acronym THHN stands for _____
Wet ( can be submerged in water)
The letter W in wire acronyms stands for ____
High heat (194 F)
The letters HH inwire acronyms stands for ____
Underground feeder
UF Cable is also known as _____ cable, and is a direct burial cable
Underground service entrance
USE Cable is a direct burial cable that stands for____.
Color, tagging, or other distinguishable means
We are independent support wires are used, they shall have _____ to differentiate from those of fire rated design.
Not less than 1 1/4"
When cables are installed parallel to framing members, The nearest outside surface of the cable shall be____ to the nearest edge of the framing member to avoid nails and screws.
1 1/4 inches
When cables are installed through bored holes in joists, rafters, or wood members, the holes shall be bored so that no less than ____ is from the edge of the wood member..
18 inches
When installing PVC underground without concrete ,there shall be a minimum ______ of cover.
Bushing or terminal fitting
When installing direct buried cables, a _____ shall be used at the end of a conduit that terminates underground.
#4AWG
When raceways contain conductors____ or larger, The conductors shall be protected from abrasion during and after installation by a fitting that provides a smooth rounded insulating surface.
Bushings or grommets
When type NM cable passes through factory openings in metal members it shall be protected by ____that cover metal edges
3 inches
Wihen the opening to an outlet junction or switchpoint is less than 8 inches in any dimension , each conductor shall be long enough to extend at least ____ outside the opening of the enclosure.
