Module 6
NEC® Installation Quiz
Test your knowledge on the National Electrical Code (NEC®) requirements and best practices for electrical box installations. This quiz covers essential topics such as receptacle requirements, conductor counts, and special installation scenarios.
Improve your understanding of:
- NEC® regulations
- Electrical installation standards
- Requirements for specific types of boxes
Which of the following is a general NEC® requirement for installing boxes?
The box must be at least 2" deep.
The box must be installed flush to the wall surface
The box must be of a sufficient size to permit locknuts to be properly installed.
The finished installation must be accessible for future repair or maintenance.
According to NEC Section 210.52, laundry areas require at least _____.
One receptacle
Two receptacles
Three receptacles
Four receptacles
What size of a junction box must be used if there is one 4" conduit and two 3" conduits entering on one side of the box and exiting at a 90° angle on another side of the box? (Assume the conductor size is No. 4 AWG or larger.)
30"
48"
56"
60"
Two cables that each have two wires enter a box, are connected to a terminal, and then exit again. The total conductor count is _____.
1
2
3
4
How many additional conductors (wires) must be deducted from a box that contains a maximum number of eight No. 12 wires and two spliced conductors?
1
2
3
4
Which of the following counts as two conductors when used in a box?
Each fixture stud
Each looped conductor over 6"
Each looped conductor over 12"
Each cable clamp
Which of the following will cause the number of conductors allowed in a box to be reduced?
The shape of the box
The use of cable clamps
Locating the box in a wet area
The addition of box extension rings
Which type of boxes are typically used for wall-mounted lighting fixtures?
Aluminum boxes with threaded hubs
NM device boxes
Handy boxes
Octagon and round boxes
If a switch is used in a box where no grounding conductors are part of the wiring, how many conductors must be deducted?
1
2
3
4
Which of the following pulls requires the length of the box to be no less than eight times the trade diameter of the largest raceway?
Straight pull
Angle pull
U pull
Circle pull
What is the minimum length on a straight pull for a pull box with two 1" conduits and one 5" conduit on one wall, and two 1" conduits and one 5" conduit entering the opposite wall?
40"
48"
56"
64"
The special box used in a flat-slab construction job is known as a _____.
Masonry box
Metallic octagon box
Nonmetallic device box with integral nails
Nonmetallic device box with side bracket
The NEC® requires that all octagon boxes have a minimum depth of _____.
1/4"
1/2"
1-1/4"
1-1/2"
A handy box is a special single-gang box that is also known as a _____.
Square box
Utility box
Round box
Masonry box
According to NEC Section 210.52(C)(5), the maximum mounting height for a receptacle installed above a kitchen countertop is _____.
5"
8"
14"
20"
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