Question 1

Service entrance cable with an uninsulated conductor (Type SEU) is permitted to be used as the branch circuit wiring method for an electric range.

Accepted Answer

If used as a branch circuit wiring method for an electric range, it must be the SER type that has an insulated grounded conductor.

Question 2

The NEC requires insulated staples to be used when securing and supporting Type NM cable.

Accepted Answer

Some AHJs require the use of insulated staples but the NEC does not.

Question 3

Type AC cable installed in thermal insulation must have conductors rated at 90⁰C (194⁰F).

Accepted Answer

This statement is true as per the standard IEC 60332-3-24. The cable installed in thermal insulation is subjected to high temperatures, which can potentially damage the insulation material and cause a fire hazard. Therefore, the conductors used in such cables must have a temperature rating of 90°C and be made of materials that are resistant to fire. The rating specified in the statement (90⁰C or 194⁰F) meets these requirements.

Question 4

Which of the following is not a type of nonmetallic sheathed cable?

Accepted Answer

Types NM, NM-B, and NMC are all types of nonmetallic sheathed cable, whereas Type NM-U does not exist as a recognized type of cable.

Question 5

If a hole is bored into a stud and there is less than 1 1/4" between the edge of the hole and the edge of the stud, a steel plate at least 1/16" thick or a listed and marked steel plate that is less than 1/16" if it still provides equal or greater protection against nail or screw penetration, must be used.

Accepted Answer

This is in accordance with the International Residential Code (IRC) section R602.6.1.

Question 6

Romex must be secured at no more than __________ inches from all electrical boxes except a nonmetallic single-gang box.

Accepted Answer

The answer of Romex must be secured at no more...

Question 7

Even though the NEC permits Type NM cable to be used in one- and two-family homes, it may not be approved for use in your area by the AHJ.

Accepted Answer

The AHJ (Authority Having Jurisdiction) in your area may have additional requirements or restrictions on the use of Type NM cable, even though it is permitted by the NEC (National Electrical Code) for one- and two-family homes. It is important to check with your local building department or electrical inspector before using Type NM cable in your electrical installation.

Question 8

Suspended ceiling grids are permitted by the NEC to support nonmetallic sheathed cables.

Accepted Answer

Cable cannot be laid on top of a suspended ceiling grid and be considered supported.

Question 9

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.

Accepted Answer

The answer of Romex installed in either a metal or...

Question 10

Most engineered I-beams come from the manufacturer with perforated knockouts that allow an electrician to remove the knockout and install cables through the holes.

Accepted Answer

This is true. Perforated knockouts are commonly found on engineered I-beams to allow for installation of cables.

Question 11

The electrician can incorporate waste from rough and finish wiring phases into the jobsite-recycling system.

Accepted Answer

The electrician can and should incorporate waste from both rough and finish wiring phases into the jobsite-recycling system. By doing so, valuable resources can be conserved, and waste can be diverted from landfills.

Question 12

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) __________.

Accepted Answer

The insulated anti-short fitting used in Type AC cable is commonly referred to as a "red head."

Question 13

Cables run along the sides of framing members must be installed at least __________ from the nearest edge of studs, joists, or rafters.

Accepted Answer

Cables must be installed at least 1-1/4 inches from the nearest edge of studs, joists, or rafters to prevent nails or screws from penetrating the cables.

Question 14

Type NM and Type UF cables must have their cable sheath extend into nonmetallic boxes and beyond any cable clamp at least 1/2 inch (6 mm).

Accepted Answer

1/4 inch

Question 15

During the rough-in wiring phase, an electrician always routes cable through floors or ceilings, which provides shorter routes than do perimeter walls.

Accepted Answer

Routing cable through floors or ceilings is not always shorter than perimeter walls; it depends on the building layout and design.

Question 16

When service entrance cable is used for branch circuits, the only conductor permitted to be bare is the equipment grounding conductor.

Accepted Answer

This is because the equipment grounding conductor is the only conductor that is permitted to be bare for safety reasons. All other conductors require insulation for proper electrical function and safety.

Question 17

The inner edge of any bend in nonmetallic sheathed cable cannot be less than __________ times the cable diameter.

Accepted Answer

The answer of The inner edge of any bend in...

Question 18

Romex is considered to be supported when it passes through bored or punched holes in framing members that are no more than 4 1/2 feet apart.

Accepted Answer

According to the National Electric Code (NEC), Romex may pass through bored or punched holes in framing members that are no more than 4 1/2 feet apart without additional support.

Question 19

A 'homerun' may enter a loadcenter through knockouts in the back, sides, top, or bottom of the loadcenter.

Accepted Answer

A homerun can enter a loadcenter through various knockouts, including those in the back, sides, top, or bottom of the loadcenter.

Question 20

In attics not accessible by permanent stairs or ladders, Romex run across the top of floor joists within __________ of the scuttle hole must be protected by means such as guard strips.

Accepted Answer

According to NEC 320.23, Romex run across the top of floor joists within 6 feet of the scuttle hole must be protected by means such as guard strips.

Quiz 11: Cable Installation