WorksheetsDevice Boxes (Electrical L1) Quiz
Total questions: 10
Worksheet time: 5mins
If there are four equipment grounding conductors in a box, how many conductors must you subtract from the total allowed?
One
Four
Three
Two
Square metal boxes are available in 4" and _____.
4 11/16"
5 1/2"
3 3/4"
6 1/4"
A conductor under 12" (300 mm) long running through a box counts as the conductor equivalent of _____.
0
12
1
2
If you have a pull box with conduit runs entering at right angles, how deep should it be?
It must be eight times the diameter of the smallest conduit.
It must be six times the diameter of the smallest conduit.
It only has to be deep enough to allow the proper installation of locknuts and bushings.
It must be four times the diameter of the largest conduit.
A box installed under an open porch with a roof is considered a _____.
dry location
wet location
weatherproof location
damp location
You can increase the capacity of an electrical box by using _____.
fixture studs
wire connectors
raised outlet covers
strap-mounted devices
The maximum weight allowed by the NEC® when ceiling fans are mounted directly to an approved, unmarked box is _____.
55 lb
45 lb
35 lb
25 lb
If the largest trade size of conduit entering a pull box is 3", and it is a straight pull, the minimum box length allowed is _____.
24"
20"
36"
30"
How many conductors must be taken away for each device strap?
One
Three
Two
Four
The rules for box installations are in _____.
NEC Article 314, Part II
NEC Article 250, Part I
NEC Article 300, Part IV
NEC Article 400, Part III
