Boxes and Enclosures

Question 1

In pull boxes or junction boxes having any dimension over _______ feet. All conductors shall be cabled or racked up in an approved manner.

Answer 1

6ft (72in)

Question 2

A nonmetallic extension can be run in any direction from an existing outlet, but shall not be run on the floor or within ______ inches from the floor

Answer 2

2 inches
382.15(A)

Question 3

Outlet boxes that do not enclose devices or utilization equipment shall have a minimum internal depth of ______ inches?

Answer 3

1/2 inch
314.24

Question 4

In damp or wet locations, surface-type enclosures (within scope of Article 312) shall be so placed or equipped as to prevent moisture or water from entering and accumulating within the cabinet or cutout box and shall be mounted so there is at least _______ inch of airspace between the enclosure and the wall or other supporting surface.

Answer 4

1/4 Inch
312.2

Question 5

The minimum thickness in inches for a steel box measuring 6 in x 4 in x 3.5 in is ________ inches.

Answer 5

0.0625 Inches
314.40(B)

Question 6

Covers of outlet boxes and conduit bodies having holes through which flexible cord pendants may pass shall be provided with approved ________ or shall have smooth, well-rounded surfaces on which the cord may bear.

Answer 6

Brushings
314.25(C)

Question 7

Where permanent barriers are installed in a junction box, each section shall be considered as a _________.

Answer 7

Separate Box
314.28(D)

Question 8

What is the maximum number of 12 AWG THW conductors permitted in a 4-inch octagon box that is 1.5 inches deep? (The box contains a fixture stud and a Hickey)

Answer 8

4
Table 314.16(a)
314.16(B)(3)

Question 9

A means must be provided in each metal box for the connection of a ______________.

Answer 9

Equipment ground conductor
314.40(D)

Question 10

Installation in or behind a surface of concrete, tile, gypsum, plaster, or other non-combustible material, including boxes employing a flush-type cover or faceplate, shall be made so that the front edge of the box, plaster ring, extension ring, or listed extender will not be set back of the finished surface more than __________ inches.

Answer 10

1/4 inch
314.20

Question 11

Nonmetallic boxes shall be suitable for the lowest __________ Conductor entering the box.

Answer 11

Temp Rated
314.17(C)

Question 12

An electrician needs to install a surface-mounted, nonmetallic, weatherproof cabinet on the outside of a concrete block building. Since the cabinet must be mounted in an wet location, it must be mounted so there is at least _________ inches of airspace between the cabinet and the wall.

Answer 12

0
312.2 Exception

Question 13

How many 14 AWG THW conductors are permitted in a 3 in. x 2 in. x 2.5 in. device box?

Answer 13

6
Table 314.16(A)

Question 14

Nonmetallic surface mounted extensions must be secured in place by approved means at intervals not exceeding ________ inches.

Answer 14

8 inches
382.30(A)

Question 15

A 2.5-in. rigid metal conduit enters the back of a pull box with a removeable cover on the opposite side. The raceway encloses four 4/0 AWG THHN copper conductors and one 4 AWG equipment grounding conductor. The minimum depth for this pull box is__________-?

Answer 15

4 inches
Table 312.6

Question 16

Where nonmetallic boxes are used with open wiring or concealed knob-and-tube wiring, the conductors must enter the box through ___________.

Answer 16

Individual holes
314.17(C)

Question 17

Luminaires weighing no more than _______ pounds can be supported by boxes not specifically designed to support luminaires, provided the luminaire, or its supporting yoke, is secured to the box with at least two No. 6 or larger screws.

Answer 17

6 lbs.
314.29(1) Exception

Question 18

For straight pulls, the length of the box shall not be less than ________ the outside diameter over sheath, of the largest shielded conductor or cable entering the box on the systems over 1000 volts nominal.

Answer 18

48 Times
314.71(A)

Question 19

Approved drainage openings not smaller than _______ and not larger than ____ in diameter shall be permitted to be installed in the field in boxes or conduit bodies listed for use in damp or wet locations.

Answer 19

1/8 and 1/4
314.15

Question 20

unused openings, other than those intended for the operation of equipment, those intended for mounting purposes, or those permitted as part of the design for listed equipment, shall be closed to afford protection ________ to the wall of the equipment.

Answer 20

Substantially equipment
110.12 (A)