Question 1

Prior to the 1996 NEC, ____ receptacles and cords were permitted. However, now it is mandatory that a separate equipment grounding conductor be installed to ground the frames of electric clothes dryers and electric ranges.

Accepted Answer

Prior to the 1996 National Electrical Code (NEC) update, 3-wire receptacles and cords were permitted for electric clothes dryers and electric ranges. This system did not require a separate equipment grounding conductor. However, the NEC now mandates a 4-wire system that includes a separate ground for enhanced safety.

Question 2

For most residential electric ____, receptacles and cord sets are rated 30 amperes, 125/250 volts.

Accepted Answer

For most residential settings, clothes dryers typically require receptacles and cord sets rated at 30 amperes, 125/250 volts to accommodate their power needs.

Question 3

A powder room is considered a bathroom if it contains a(n) ____________________ and a toilet, urinal, tub, shower, bidet, or similar plumbing fixture.

Accepted Answer

basin

Question 4

If an electric clothes dryer or electric range is to be installed in a residence where the dryer branch-circuit wiring had been installed according to pre-1996 NEC rules, how is the dryer frame grounded?

Accepted Answer

The answer of If an electric clothes dryer or electric...

Question 5

The special permission that was put into effect in July of 1942 allowed the neutral conductor to serve a dual purpose as the neutral conductor and the ____________________.

Accepted Answer

The answer of The special permission that was put into...

Question 6

NEC 210.52(F) requires a(n) ____________________ in one-family dwellings.

Accepted Answer

The answer of NEC 210.52(F) requires a(n) ____________________ in one-family...

Question 7

NEC 210.70(A)(3) addresses ____ that are used for storage and attics that contain equipment that might need servicing, such as air-conditioning equipment.

Accepted Answer

NEC 210.70(A)(3) specifically addresses attics that contain equipment that might need servicing. Therefore, D is the best choice.

Question 8

When running cables parallel to framing members, at least ____________________ inches must be maintained between the cable and the edge of the framing member.

Accepted Answer

The answer of When running cables parallel to framing members,...

Question 9

Electric washer/dryer combinations generally require a ____-ampere branch circuit similar to that required for a typical electric clothes dryer.

Accepted Answer

Electric washer/dryer combinations typically require a 30-ampere branch circuit, which is similar to the requirement for a standard electric clothes dryer. This ensures sufficient power for both washing and drying functions without overloading the electrical system.

Question 10

The NEC requires that an appliance nameplate show ____.

Accepted Answer

According to the NEC, the appliance nameplate should show either the appliance rating in volts and amperes or the connected load in volts and watts. Therefore, the correct choice is either A or C, making D the best choice as it includes both options.

Question 11

The maximum overcurrent protection for ____ AWG copper conductors is 30 amperes.

Accepted Answer

10 AWG copper conductors are rated for a maximum of 30 amperes according to the National Electrical Code (NEC) tables for conductor ampacity.

Question 12

A "unit switch" used as a disconnecting means for an electric clothes dryer shall ____.

Accepted Answer

The answer of A "unit switch" used as a disconnecting...

Question 13

Describe one accepted grounding means for the frames of electric dryers and electric ranges in new installations.

Accepted Answer

The answer of Describe one accepted grounding means for the...

Question 14

When electric clothes dryers and electric ranges are cord-and-plug connected, the receptacle and the cord set must be 4-wire, the fourth wire being the separate equipment grounding conductor.

Accepted Answer

This is in accordance with the National Electrical Code (NEC) requirements for safety. The equipment grounding conductor provides a path for any potentially dangerous fault current to flow safely to the ground, helping to protect people and property from electrical hazards.

Question 15

A minimum load of 5500 watts (volt-amperes) or the nameplate rating of the electric clothes dryer, whichever is larger, is used when calculating the dryer load for service-entrance requirements.

Accepted Answer

The answer of A minimum load of 5500 watts (volt-amperes)...

Question 16

All 125-volt, single-phase, 15- and 20-ampere receptacles within ____________________ ft of the outside edge of a sink shall be GFCI protected.

Accepted Answer

The answer of All 125-volt, single-phase, 15- and 20-ampere receptacles...

Question 17

When an existing dryer or electric range is replaced, the NEC ____ the grounded conductor of an existing individual branch circuit to be used for grounding the appliance frame.

Accepted Answer

According to NEC 250.140, if an existing dryer or electric range is replaced, the grounded conductor of an existing individual branch circuit may be used for grounding the appliance frame, provided certain conditions are met. Therefore, the NEC permits the use of the grounded conductor as a grounding conductor in this specific situation.

Question 18

A(n) ____ is NOT an acceptable disconnecting means for appliances.

Accepted Answer

A horsepower-rated switch is specifically designed for motors and may not be suitable for all appliances, especially those that do not operate on a motor principle or require a different type of control for safe disconnection. Choices A, B, and D are generally accepted means for disconnecting appliances, with visibility, lockability, and the simplicity of unplugging serving as safety measures.

Question 19

In accessible attics, exposed cables must be protected by guard strips when ____.

Accepted Answer

All of the above options require protection of exposed cables in accessible attics with guard strips. This is because running cables across the top of joists or face of studs can cause damage or wear over time, and installing the cables within 7 feet of the floor or floor joists increases the risk of accidental damage or contact. Guard strips provide a physical barrier to prevent these issues.

Quiz 15: Dryer Outlet, Lighting and Receptacle Circuits for the Laundry, Powder Room, Rear Entry Hall, and Attic