NCCER Ch 6 Review

The maximum weight allowed by the NEC® when ceiling fans are mounted directly to an approved, unmarked outlet box is

• 25 pounds

• 35 pounds

• 45 pounds

• 55 pounds

Square metal boxes are available in sizes of 4" and

• 4 1/4"

• 5"

• 5 1/4"

• 6"

A box installed under a roofed open porch is considered a

• dry location

• wet location

• damp location

• weatherproof location

How many conductors must be deducted for each strap-mounted device in a device box?

• One

• Two

• Three

• Four

The capacity of an outlet box can be increased by using

• fixture studs

• strap-mounted devices

• wire nuts

• raised device covers

A conductor under 12" (300 mm) long running through a box counts as the conductor equivalent of

• 0

• 1

• 2

• 12

If there are four equipment grounding conductors in a box, you must deduct conductor(s) from the total allowed.

• 1

• 2

Box installations are covered in

• NEC Sections 314.1 through 314.4

• NEC Sections 314.15 through 314.30

• NEC Sections 314.40 through 314.44

• NEC Sections 314.70 through 314.72

If the largest trade diameter of a raceway entering a pull box is 3", and it is a straight pull, the minimum size box allowed is

• 20"

• 24"

• 30"

• 36"

The depth of a pull box with conduit runs entering at right angles

• need only be deep enough to permit the proper installation of locknuts and bushings

• must be eight times the diameter of the smallest conduit

• must be four times the diameter of the largest conduit

• must be six times the diameter of the smallest conduit