The equipment grounding terminal buses of the normal and essential branch-circuit panelboards serving the same individual patient care vicinity in a health care facility shall be connected together with an insulated continuous copper conductor not smaller than ___________.

Harmonic currents are present in the neutral conductor when the loads are ______________.

Each 20 amp, 120 volt outlet installed for an electric sign, in a retail occupancy, shall be calculated at a minimum of ______________.

A fixed storage type water heater that has a capacity of ___________ or less shall be considered a continuous load for the purposes of sizing branch circuits.

All 125-volt, 1-phase receptacles not exceeding _______________ and located within 6 ft. of a hydromassage tub shall be GFCI protected.

Which of the following statements regarding branch-circuit, short-circuit, and ground-fault protection for motors is/are true?
I. A listed self-protected combination controller is permitted in lieu of fuses or circuit breakers.
II. Torque motors shall be protected at the nameplate current rating.

Equipment that is associated with the electrical installation and located within the required clear wok space above or below the electrical equipment shall be permitted to extend not more than ________ beyond the front of the electrical equipment.

How many multiconductor cables are allowed in a solid bottom cable tray with an interior width of 12 in. if all of the conductors are smaller than 4/0 AWG and the cross-sectional area of each cable is 0.2223 in.²?

Equipment marked with a temperature class T3 would be suitable for operation in a maximum ambient temperature of __________.

What maximum size grounding electrode conductor is required for a dc system?

At least one receptacle outlet shall be installed at each island countertop space in a dwelling unit kitchen with a long dimension of _________ or greater and a short dimension of ___________ or greater.

What is the minimum calculated service load for 10 – 15.8 kW electric ranges installed in a home economics classroom?

The header of a cellular concrete floor raceway shall be installed in a straight line ___________ to the cells.

The most common nominal cell voltage for a lithium-ion type battery is __________ per cell.

The conductors for a 60 ampere rated branch circuit have been increased in size from 6 AWG copper to 2 AWG copper to compensate for voltage drop. What minimum size copper equipment grounding conductor is required for this branch circuit?

Which of the following statements is/are true regarding the use of electric space-heating cables?
I. The heating cables shall not extend beyond the room or area in which they originate.
II. Heating cables are allowed to be installed in clothes closets with dimensions not less than 4 ft. x 6 ft.

Transformer secondary conductors rated over 1,000 volts and used for field installed neon tubing shall not exceed __________ in length where installed in nonmetallic conduit.

Nails and screws, where used as a fastening means, shall be attached by using brackets on the outside of the enclosure, or they shall pass through the interior within ________ of the back or ends of the enclosure.

Article 530 of the 2017 N.E.C. applies to areas of a motion picture or television studio where film or tape more than ___________ in width is exposed, developed, printed, cut, edited, rewound, repaired, or stored.

Rod-type grounding electrodes of stainless steel, copper, or zinc coated steel shall be at least __________ in diameter, unless listed.

Each operating room in a health care facility shall be provided with a minimum of _____________ receptacles divided between at least two branch circuits.

Mats of insulating rubber or other suitable floor insulation shall be provided for the operator of a live front switchboard where the voltage to ground exceeds _____________.

Two-wire, dc generators shall be permitted to have overcurrent protection in one conductor only if the overcurrent device is _____________.

Circuit breakers used as switches in high-intensity discharge lighting circuits shall be listed and shall be marked as __________.

Which of the following luminaire types is not allowed in a clothes closet?