Residential Chapter 2 Quiz 3
What are the common diameters for screws in electrical work?
#6,8,10
The volume allowance for conductors that originate within the box and don't leave? (CT 314.1)
0 conductors are not counted
What is the volume allowance for conductors that originate outside box? (CT 314.1)
1 for each conductor
What is the volume allowance for conductors that pass through the box without splice or connection? (CT 314.1)
1 for each conductor
Based on the largest sized conductor present, 1 or more internal cable clamps have what volume allowance? (CT 314.1)
1 only
If there is a receptacle and a switch on 1 mounting strap, what is the volume allowance?
2
What is the volume allowance for conductors 12 in or greater that are looped and unbroken? (CT 314.1)
2 for a single unbroken conductor
14 AWG = ______ cubic inches
2.00
12 AWG = ______ cubic inches
2.25
10 AWG = _______ cubic inches
2.50
NEC 314.25
All boxes must have cover or faceplate
NEC 314.16
Boxes must be large enough for all conductors and wiring devices
NEC 300.11 and 314.23
Boxes must be securely mounted and fastened in place
NEC 314.27 (A) (1)
Boxes used at luminaire or lamp holder outlets that are vertical, if able to support other than 50 lbs, must be marked on the interior of the box to show the max weight of luminaire that is permitted
Devices such as receptacles, switches, dimmers, timers, etc., have how much volume allowance?
It has 2 for each yoke or mounting strap
Equipment grounding conductors (1 or more) have what volume allowance?
Just 1
Fixture wires (up to 4 and including grounding) has what volume allowance? (CT 314.1)
None
Support fitting such as luminaire studs and hickeys have ______ volume allowance. (CT 314.1)
One for each type of support fitting
NEC 314.24
Outlet/device boxes are required to be an approved depth, so conductors won't be damaged when installing device/equipment
What does the # 32 mean in 6-32 screw?
The number of threads per inch or "pitch" of the thread
True or false. Plaster rings do not go on device boxes,but can be put on square boxes
True
Multitap tool
Used to clean out threaded holes
EXCEPTION TO NEC 314.27
Vertically mounted luminaire weighing no more than 6 lbs can be supported on other boxes or plaster rings that are secured to other boxes, provided luminaire or lamp holder is secured to box with no fewer than 2 NO.6 or larger screws
NEC 300.15
Where conduit, NM Cable, or other cables are installed, a box or conduit body must be installed at each conductor splice connection point, outlet or others.
