Service disconnecting means for each service shall consist of not more than __________ switches or sets of circuit breakers.

The walls, roofs, and floors of transformer vaults shall be constructed of materials with a minimum fire resistance rating of ___________.

Which of the following statements regarding fire alarm systems is/are true?
I. The accessible portion of abandoned fire alarm cables shall be removed.
II. Power limited fire alarm circuit conductors shall not be attached to any conduit for support.

What minimum size THW copper conductors are required to supply a 1-phase, 5 hp, 230 volt motor?

In no case shall the point of attachment for overhead service conductors be less than ________ above finished grade.

Portable electric signs, installed in wet locations, shall be provided with GFCI protection that is an integral part of the attachment plug or located in the power supply cord within ________ of the attachment plug.

The frame of a portable generator shall not be required to be connected to a grounding electrode if ____________.
I. The generator supplies only equipment mounted on the generator, cord-and-plug connected equipment through receptacles mounted on the generator, or both.
II. The normally non-current carrying metal parts of equipment and the equipment grounding terminals of the receptacles are connected to the generator frame.

What is the minimum total calculated branch circuit load for 2 show windows that are 20 ft. in length?

In a motor control center, the ______ phase shall be the phase having the higher voltage to ground on 3-phase, 4-wire, delta-connected systems.

Storage batteries for photovoltaic systems, installed in dwelling units, shall have the cells connected so as to operate at a voltage of _______ , nominal, or less.

The total rating of utilization equipment fastened in place, other than luminaires, shall not exceed _______ of the branch-circuit ampere where lighting units, cord-and-plug connected utilization equipment not fastened in place, or both, are also supplied.

What is the approximate thickness of the insulation of a 10 AWG type SJ flexible cable?

In indoor wet locations, the entire wiring system, where installed exposed, including all boxes, fittings, raceways, and cable used therewith, shall be mounted so that there is at least a _________ airspace between it and the wall or supporting surface.

For a wye-start, delta-run connected hermetic refrigerant motor-compressor, the selection of branch-circuit conductors between the controller and the motor-compressor shall be permitted to be based on ________ of either the motor-compressor rated-load current or the branch-circuit selection current, whichever is greater.

Service heads and goosenecks in service-entrance cables shall be located ____________ the point of attachment of the service-drop or overhead service conductors to the building.

Where a motor control center operates at a nominal voltage to ground of 277 volts, the depth of the working space in the direction of live parts shall not be less than _______________ if there are no live or grounded parts on the other side of the working space.

What is the maximum number of 3/0 AWG, THWN conductors allowed in a 2 in. electrical metallic tubing that is over 24 in. long?

What is the allowable ampacity of each conductor where 6 current-carrying, 500 kcmil, XHHW, aluminum conductors are installed in an underground raceway in an ambient temperature of 25° Celsius?

Where conduit seals are required for explosionproof enclosures in Class I, Division 1 hazardous locations, the seals shall be installed within ___________ from the enclosures.

When using the optional method of service load calculations for a dwelling unit, _________ of the nameplate rating of electric heating must be used in the calculation when four or more separately controlled units are installed.

Temporary lighting for holiday decorative purposes shall be allowed for a period not to exceed ___________.

Surface metal raceways with a metal thickness of less than 0.040 in. are allowed for use where the voltage does not exceed __________.

If the voltage of a circuit increases but the resistance stays the same, what happens to the current?

Non-self-supporting ladders shall be used at an angle such that the horizontal distance from the top support to the foot of the ladder is approximately _______________ of the working length of the ladder.

When metal fencing around an energized substation must be expanded or removed, for construction purposes, a temporary fence must be provided when the site is unattended and ________________.