What is the cost per year for the power losses of an 8 AWG copper conductor that is 110 feet in length, has a total resistance of 0.09 ohms and a current draw of 34 amps if electricity cost $0.11 per kWh?

The maximum permissible span for a 1 ¼ in. x 9 in. or wider wood plank of full thickness to be used as a scaffold plank with a maximum intended load of 50 lb./ft.2 shall be _______________.

The weight of a demolition ball shall not exceed _______________ of the crane’s rated load.

Power supply service drops operating at 0 – 750 volts running above and parallel to communications service drops shall have a minimum separation of __________ between the two services at any point in the span, when the ungrounded conductors are insulated.

A portion of the closet storage space as defined by the N.E.C., is the horizontal distance of ___________, from the side and back walls of the closet, or the width of the shelf, whichever is greater.

Overload protection for service conductors shall be provided by installing an overcurrent device in series with each ______________ service conductor.

Where nonmetallic conduit is used for the direct connection to a forming shell of a wet-niche luminaire, installed in a swimming pool, a(n) ____________ insulated copper bonding jumper shall be installed in the conduit unless a listed low-voltage lighting system not requiring grounding is used.

Live parts operating at 301 – 600 volts are considered guarded against accidental contact if they are elevated at least ____________ above the floor or working surface.

Conductor sizes are typically expressed in AWG which stands for ____________.

Outlet boxes installed within or behind a surface of concrete, tile, gypsum, plaster, or other noncombustible material, employing a flush-type cover or faceplate shall be made so that the front edge of the box, plaster ring, extension ring, or listed extender will not be set back of the finished surface more than ______________.

Single conductor cable shall be permitted for use in sizes ___________ or larger when installed for temporary power at fairs.

When used with Class 1 circuits, overcurrent protection shall not exceed __________ for 16 AWG conductors.

Which phase is required to be the phase with the higher voltage to ground on 3-phase, 4-wire, delta-connected system?

Where the voltage between conductors does not exceed 300 and not more than ________ of overhead service conductors pass over the overhanging portion of a roof, a reduction in clearance, above the roof, to not less than 18 in. shall be permitted.

What is the minimum copper conductor size allowed for Type MC cable?

What is the minimum thickness required for the sealing compound inside of a completed ½ in. sealing fitting used within a Class I hazardous location?

A concrete-encased electrode shall consist of 20 ft. of steel reinforcing bars not less than __________ or bare copper conductor not smaller than 4 AWG.

What minimum size THW copper conductors are required to supply a 3-phase, 7 ½ hp, 208 volt, 15-minute rated, intermittent duty motor with a nameplate rating of 25.3 amperes?

Branch circuit conductors supplying continuous loads shall have an allowable ampacity not less than ____________ of the continuous load.

The overall length of a mobile home power-supply cord, measured from the end of the cord, including bared leads, to the face of the attachment plug cap shall not be less than ____________.

Which of the following wiring methods is not allowed to be used in ducts used to transport environmental air?

An RV park with electrical supply is equipped with 160 sites. How many of these sites must be equipped with 30 ampere, 125 volt receptacles?

What is the minimum volume required for an outlet box that contains the following?
4 – 8 AWG ungrounded conductors
4 – 8 AWG grounded conductors
1 – 8 AWG grounding conductor
2 – 10 AWG ungrounded conductors
2 – 10 AWG grounded conductors
1 – 10 AWG grounding conductor
4 – internal cable clamps

The duty rating of escalator motors is considered to be ____________.

A cable, raceway, or box, installed under metal-corrugated sheet roof decking, shall be installed and supported so there is not less than __________ measured from the lowest surface of the roof decking to the top of the cable, raceway, or box.