Chapter 15 EO test

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

disconnects all the conductors in the appliance

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

horsepower-rated switch

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 ____________________.

equipment grounding conductor

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

laundry receptacle outlet

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 for appliance frame.

permits

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

washers and dryers

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

1-1/4

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

10

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.

3-wire

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

30

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

6

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.

False

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

One accepted grounding means is to connect the appliance with a metal raceway such as EMT, an equipment grounding conductor installed through flexible metal conduit. The separate equipment grounding conductor found in nonmetallic-sheathed cable is also an acceptable equipment grounding means. Service-entrance cable is also permitted as a branch circuit to an electric dryer or electric range.

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?

The wiring does not have to be changed. Use the grounding strap furnished by the dryer manufacturer to make a connection between the neutral conductor and the frame of the dryer.

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.

True

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

all of these

The NEC requires that an appliance nameplate show the ____.

appliance rating in volts and amperes or the appliance-connected load in volts and watts

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.

attics

A powder room is considered a bathroom if it has a(n) ____________________, plus one or more of the following: a toilet, a urinal, a tub, a shower, a bidet, or similar plumbing fixtures.

basin