400
EMT shall be securely fastened in place at least every ____ feet.
10 feet
Lengths of busway are allowed to extend through _____ if they are unbroken.
Dry walls.
How far must the separation be between any light, power, or Class 1 conductors or radio and television conductors, and underground antenna conductors for radio and television receiving equipment.
12 in
For a fixed or stationary electric sign installed in a fountain, the disconnecting means must be at least how far horizontally from the inside wall of the fountain?
5 ft
Essential electrical systems for hospitals are comprised of which branches?
The life safety, equipment, and the critical
Three-way and four-way switches shall be so wired that all switching is done:
Only in the underground circuit conductor.
Conductors, including splices and taps, shall not fill gutters to more than ____ percent of its area.
75%
Power, lighting, or Class 1
From the inside walls of an indoor installed spa or hot tub to the wall switches, what is the minimum distance?
5 feet
What is the minimum rating allowed for 120/240 volt, single-phase service equipment for a mobile home?
100 amperes
Fixtures shall not be smaller than _____ AWG.
18
For a 4-inch square box 2.125" deep, with No. 12 copper conductors, what is the maximum fill allowance?
13
What is the minimum clearance for communications wires and cables above all points of roofs above which they pass?
8 feet
What is the smallest size grounding conductor allowed for grounding the structural reinforcing steel of a swimming pool?
8 AWG
What is the minimum rating for single receptacle shore power for boats?
30 amperes
17
The volume allowance required for each 14 AWG conductor, when calculating box fill, shall be ______ cubic inches.
2 cubic inches
A bonding jumper not smaller than ____ AWG copper or equivalent must be connected between the radio and tv equipment grounding electrode and the power grounding electrode system when they are separate.
6 AWG
The term for the circuit(s) between modules and from modules in a PV system to the common connection point(s) of the direct-current system is:
Photovoltaic source circuit
Which Class locations is hazardous because of the presence of materials producing combustible flyings, or having easily ignitable fibers present, but where they are not expected to be in sufficient quantities to create an ignitable mixture?
Class III
Where may flexible cords and cables not be used?
When run through holes in walls.
All metal boxes shall be _____ or bonded.
Grounded
True or False: The raceway fill limitations detailed in 300.17 will apply to coaxial cables.
False
What is the minimum percentage of the maximum current rating for PV system overcurrent devices, as calculated in 690.8(A)?
125%
True or false: Receptacles in health care facilities that have isolated grounding terminals as described in 250.146(D) are allowed in the vicinity of patient care areas.
False