What is the minimum clear width of the working space required in front of a battery rack used as a back-up power supply?

Which of the following is not allowed to be used as a grounding electrode?

Lighting track shall not be installed less than ____________ above the finished floor except where protected from physical damage or where the track operates at less than 30 volts rms open-circuit voltage.

A 3-phase, 4-wire wye connected electrical system has a current draw of 132 amperes on A phase, 132 amperes on C phase, and 0 amperes on B phase. What is the approximate current in the neutral conductor?

What is the maximum setting for the overcurrent protective device used for protection of a phase converter that supplies variable loads if the nameplate input load is 23 amperes?

What is the maximum number of 8 AWG, RHW conductors allowed in a 1 in. rigid metal conduit that is over 24 in. long?

Flat conductor cable systems shall not be used in ____________.

Electrically operated in-sink waste disposers may be cord-and-plug connected with a flexible cord not less than _________ in length.

Nonmetallic raceways routed under public roads shall be buried to a depth not less than __________.

Where cables are located on only one side of a manhole intended for personnel entry, a clear work space of not less than ____________ shall be provided.

A building has a 4 AWG copper grounding electrode conductor connected to the underground metal water piping system. What maximum size copper ungrounded service entrance conductors would be allowed for this installation?

_____________ shall not be used on rigid metal conduit for connection at couplings.

The total marked rating of a cord- and attachment-plug-connected room air-conditioner shall not exceed ________ of the rating of a branch circuit where no other loads are supplied.

Type NM cable shall be permitted to be unsupported in lengths not greater than _________ from the last point of cable support to the point of connection to a luminaire within an accessible ceiling.

For each single family dwelling unit, that is at grade level, at least one receptacle outlet readily accessible from grade and not more than ___________ above grade level shall be installed at the front and back of the dwelling.

What is the allowable ampacity of each conductor where 4 current-carrying, 6 AWG, THWN, copper conductors are installed in a raceway?

What is the current draw of a 15 horsepower, 3-phase, 208 volt motor with an efficiency of 94% and a power factor of 0.96?

What is the allowable ampacity of a 14 AWG fixture wire?

The area within 5 ft. of the open end of a vent of an aboveground tank in a bulk storage plant shall be classified as a ______________ location.

What is the allowable ampacity of a 250 kcmil Type IGS cable?

What is the minimum calculated service load for the lighting of a 3,420 ft.² dwelling unit?

When judging electrical equipment for suitability, which of the following should be given consideration?

When 2 – 250 kcmil wires terminate per terminal and the conductors do not enter or leave the enclosure through the wall opposite its terminal, at least ___________ of wire bending space shall be provided at the terminals inside of a cabinet.

Wiring located above heated ceilings shall be considered as operating at an ambient temperature of ___________.

When nonmetallic sheathed cables are routed through bored holes in wood framing members, the holes shall be bored to that the edge of the hole is not less than ___________ from the nearest edge of the wood member.