Chapter 10 and 11 test
True
A "homerun" may enter a loadcenter through knockouts in the back, sides, top, or bottom of the loadcenter.
8
A 3x2x3 1/2" metal device box can hold a maximum of _____ 12 AWG conductors.
10
A 4x1 1/2" square box can hold a maximum of ______ 14 awg conductors.
35
Ceiling suspended paddle fans that weigh more than _____ pounds may be supported by an outlet box as long as the box has the maximum weight it can support marked on it.
2
For each looped or coiled, unbroken length of conductor at least 12 inches long which passes through a box without splice or connection, the volume allowance is ______ of the actual conductor size.
1/16"
If a cable is placed in notch in wood studs or other wood framing members, a steel plate at least ____ thick must be used to protect the cable.
1 1/4"
If type AC is run through a hole in a framing member that has an edge closer than ______ inches to the edge of the framing member, it must be protected by a metal plate at least 1/16" thick.
Accessible
Means capable of being removed or exposed without damaging the building structure or finish or not permanently closed in by the structure or finish of the building.
True
The NEC requires all device boxes installed to meet the requirements of section 210.52 to be no higher that 5 1/2 feet but has no other rules regarding the mounting height of electrical boxes for switches or receptacles in residential wiring.
The volume of the box
The number of conductors permitted in a box is determined by _____.
5
The radius of the curve of the inner bend in Armored Cable must not be less than ____ times the diameter of the cable.
7
Type MC cable with an interlocked armor or corrugated sheath cannot be bent to a radius of less than ____ times the external diameter of the metallic sheath.
250
Type NM cable is often purchased in _____ foot rolls that are packaged in plastic wrapping or in cardboard boxes.
False
When installing type MC cable in a house, an anti-short bushing (red head) is required at each end to provide protection for the conductors from the sharp edges of the cable armor.
6"
The NEC requires at least ____ of free conductor in electrical device boxes for connection to switches and receptacles.
Spinner
Unrolling cable from a coil is very easily done with a device commonly called a _____.
Type NM-U
Which of the following is not a type of nonmetallic sheathed cable?
Pigtail
A _____ is a short length of wire used in electrical boxes to make connections to device terminals.
Keyhole
A _____ saw is used to cut holes in lath and plaster or sheetrock walls when installing old work electrical boxes.
True
A device or outlet box can also be used as a junction box.
3x2x2 1/2"
A metal device box has two 14 awg conductors, one 14 awg grounding conductor, two internal clamps, and a duplex receptacle. What is the minimum size metal device box you could use?
12
A plastic nail-on single gang box has a volume of 24 cubic inches. What is the maximum number of 14 awg conductors it can hold?
False
A wire that has its origin inside a device box and does not leave the device box, such as a pigtail, counts as one conductor when computing box fill.
Type MI
All of the following cable types are typically used in residential wiring except _____.
Red head
An insulated anti-short fitting required to be installed in the ends of type AC cable to protect the wires from abrasion is typically called a(n) _____.
1
Each unspliced conductor that is less than 12 inches long running through a box is counted as ____ conductor when computing box fill.
Bx or AC
Electricians commonly refer to Armor Clad cable as _____ cable.
1/4"
In single-gang nonmetallic electrical device boxes, at least ____ of the cable sheathing must extend into the box.
Table 314.16 (A)
In which of the following NEC tables would you find information on box fill?
None of the above
When computing box fill, which of the following would count as one conductor?
6"
Romex installed in either a metal or plastic two-gang device box with interior cable clamps, must be secured no more than _____ from the device box.
12"
Romex must be secured at no more than _____ from all electrical boxes except a nonmetallic single-gang box.
5
The inner edge of any bend in nonmetallic sheathed cable cannot be less than ____ times the cable diameter.
6 feet
The maximum distance between supports for type NM cable is _____.
2
When computing box fill, a duplex receptacle is counted as _____ conductors of the size conductor attached to it.
1
When computing box fill, all internal clamps count as _____ conductor(s) of the largest conductor in the box.
True
When service entrance cable is used for branch circuits, the only conductor permitted to be bare is the equipment grounding conductor.
Inside of the coil
When unrolling cable from a coil, the best way is to pull the cable out of the coil from the _____.
6
Where passing through a floor on the outised of a wall, nonmetallic sheathed cable must be enclosed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, or Schedule 80 rigid PVC conduit extending alteast ______ inches above the floor.
8/2 NM cable
Which of the following cables are not permitted to be secured directly to the bottom edge of joists in an unfinished basement?
