General
Plan
Build
Use
Special
100

This is the acronym used to express the size of conductors.

What is AWG? (NEC 110.6)

100

This is a circuit conductor that is intentionally grounded.

What is grounded conductor?  (NEC 100)

100

This is the minimum burial depth for rigid metal conduit under an airport runway.

What is 18 in.? (NEC Table 300.5(A))

100

This is the minimum size of copper conductor for portable cables over 600 volts.

What is 12 AWG? (NEC 400.31(A))

100

This is a location in which ignitable concentrations of flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors can exist under normal operating conditions. 

 What is Class 1, Division 1? (NEC 500.5(B)(1)(1))

200

This is the color in which the higher voltage phase conductor is to be marked in a 4-wire, delta connected system where the midpoint of one phase winding is grounded.

What is orange? (NEC 110.15)

200

This is the number of receptacles required for a hallway in a dwelling unit that is 10 Ft. in length.

What is 1 receptacle? (NEC 210.52(H))

200

This is the maximum interval for marking AWG size on the outer jacket of a conductor or cable.

What is 24 in.? (NEC 310.8(B)(1))

200

This is the maximum height above a floor or working platform for a switch operating handle when in its highest position.

What is 6 ft 7 inches? (NEC 404.8(A))

200

This is the minimum number of receptacles required for a Category 1 patient bed location.

What is 14 receptacles? (NEC 517.19 (B)(1))

300

This is the minimum size diameter for a round access manhole opening.

What is 26 in.? (NEC 110.75)

300

This is the demand factor for a household with 3 electric clothes dryers.

What is 100%? (NEC Table 220.54)

300

This table provides ampacities for Single Insulated Conductors rated for 250 degrees C in free air.

What is Table 310.19? (NEC Table 310.19)

300

This is the maximum percentage of space that conductors can fill within an industrial control panel enclosure.

What is 75 percent?  (NEC 409.104(A))

300

This is the minimum distance from the inside wall of a permanently installed swimming pool for a 125 volt, 15 or 20 ampere receptacle. 

What is 6 ft? (NEC 680.22(A)(1))

400

This is the maximum sized conductor permitted to be connected by means of wire-binding screws or studs and nuts that have upturned lugs.

What is 10 AWG? (NEC 110.14(A))

400

This is the minimum vertical clearance of overhead service conductors above a roof surface.

What is 8.5 ft? (NEC 230.24(A))

400

This is the maximum interval for supporting a vertical run of a nonmetallic wireway.

What is 4 ft.? (NEC 378.30(B))

400

This is the code letter for a 50/60 HZ motor with a locked rotor rating of 3.55 kva per horsepower.

What is "C"? (NEC Table 430.7(B)).

400

This is the number of days permitted for holiday decorative lighting installations.

What is 90 days? (NEC 590.3(B))

500

This is the minimum distance from live parts to a fence enclosing electrical equipment operating at 105,000 volts.

What is 15 ft.? (NEC Table 110.31)

500

This is the maximum permitted overcurrent protection rating for 14 AWG copper conductors.

What is 15 amperes? (NEC 240.4(D)(4))

500

This is the minimum bend radius for non-shielded conductors in a system rated at 5,000 volts.

What is 8 times the overall diameter?  (NEC 305.5)

500

This is the minimum clearance for electric space heating cables above a heated ceiling.

What is 2 in. (NEC 424.36)

500

This is the demand factor for a lot of twenty mobile homes.

What is 25%? (NEC Table 550.31)