An electric heater with a resistance of 6 ohms is connected to a 240 volt circuit. If the heater is operated 8 hours a day and electricity cost 11¢ per kWh, how much will it cost to run the heater each week?

Lumber piles that will be handled manually shall not be stacked more than ______________ high.

Overhead protection covering of ________________ shall be provided on the top of every material hoist cage or platform.

Which of the following enclosure types, for indoor use, provides a degree of protection from circulating dust, lint, fibers, and flyings?

What is the maximum setting for the overcurrent protective device used to protect 14 AWG copper, motor control circuit conductors if the protection is provided by the motor branch-circuit protective device and the conductors do not extend beyond the enclosure?

Luminaires shall be constructed, installed, or equipped with shades or guards so that combustible material is not subjected to temperatures in excess of __________.

Flexible metal conduit is allowed for use in elevator hoistways in lengths not exceeding __________.

What is the maximum number of 1/0 AWG, THHN compact conductors allowed in a 2 ½ in. schedule 80 PVC raceway that is over 24 in. long?

An equipment grounding conductor ______________ a grounding electrode conductor.

Where equipment rated _________ or more that contains overcurrent devices is installed and there is a personnel door intended for entrance to and egress from the working space less than __________ from the nearest edge of the working space, the door shall open in the direction of egress and be equipped with listed panic hardware.

Receptacle outlets shall not be installed in or within ___________ of a shower or bathtub space in a park trailer.

Electrical metallic tubing ___________________.

A receptacle outlet shall be installed at each wall countertop space, in a dwelling unit kitchen, that is __________ or wider.

What is the volume required for a 14 AWG copper conductor installed in an outlet box?

Unused current transformers associated with potentially energized circuits shall be ____________.

At least __________ of free conductor, measured from the point in the box where it emerges from its raceway or cable sheath, shall be left at each outlet, junction, and switch point for splices or the connection of luminaires or devices.

When 2 – 250 kcmil wires terminate per terminal and the conductors 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.

Service conductors installed as open conductors without an overall outer jacket shall have a clearance of not less than ___________ from windows that are designed to be opened.

Which of the following statements is/are true regarding low-voltage lighting systems?
I. The secondary circuits shall not be grounded.
II. The use of an isolating transformer is required.

Where used at a point on a circuit, a surge-protective device shall be _____________.

Equipment grounding conductors may be identified by __________ insulation.

If sprinklers are installed in elevator hoistways, the disconnecting means for the main power supply conductors to the elevator shall be permitted to automatically ___________________.

The AWG size must be marked on the surface of nonmetallic sheathed cable at intervals not to exceed ____________.

A device provided in a power supply cord or cord set that senses leakage current flowing between or from the cord conductors and interrupts the circuit at a predetermined level of leakage current is known as a(n) ___________.

An 800 ampere, 480/277 volt, 3-phase electric service is supplied with 2 parallel sets of 500 kcmil, copper, THWN ungrounded conductors. If the calculated neutral load is 260 amperes, what minimum size copper grounded conductor is required to be installed in each raceway for this service lateral?