Chapter 6 AWR

Briefly explain the operation of an immersion detection circuit interrupter (IDCI)

it is for protecting whatever appliance on it and in case that appliance ever gets wet/submerged

Which of the following installations for a kitchen waste disposal that operates on a 15-amp, 120-volt branch circuit requires AFCI protection?

it is required regardless of the switching method

What amount of current flowing through a male human being will cause muscle contractions that will keep him from letting go of the live wire?

10 milliamps

Other than for a few exceptions, the NEC requires that all systems having a voltage of over ____ volts shall be grounded.

30

Residential GFCI devices are set to trip on a ground-fault current above ______ milliamperes

5

What range of leakage current must trip an IDFC?

6 milliamps

Explain the operation of a ground-fault circuit interrupter. Why are GFCI devices used? Where are GFCI receptacles required?

A GFCI is intended to stop people from becoming the ground. GFCIs are required in all outside receptacles, bathrooms and in kitchens within 6ft of the sink

The term SPD is becoming quite common. What do the letters stand for?

A serge protection device protects against transient voltage

Undesirable "noise" on a circuit can cause computers to lock up, lose their memory, and/or cause erratic performance of the computer. This noise does not damage the equipment. The two types of this noise are EMI and RFI. What do these letters mean?

Electromagnetic interface, Radio Frequency interface

Only the receptacles in the kitchen that are required to have GFCI protection such as those that serve counter surfaces are required to have AFCI protection. Other receptacles in the kitchen are not required to have AFCI protection.

False

The receptacle outlets in the garage are required to have both GFCI and AFCI protection.

False

Construction sites can be dangerous because of the manner in which extension cords, portable electrical tools, and other electrical equipment are used and abused. To reduce this hazard, 590.6(A) of the NEC requires that all 125 volt, single phase, 15-, 20-, and 30-ampere receptacle outlets used for temporary wiring must be ____ protected.

GFCI

Two 125 volt receptacles on a 20 amp, 120 volt branch circuit are installed in the laundry room. One (1) is for a washer and is within 6ft of the laundry sink and the other (2) is on a wall more than 6ft from the sink. The receptacles are required to have _____.

GFCI and AFCI protection for both 1 and 2

The Code requires GFCI protection for certain receptacles in the kitchen. Explain where these are required.

GFCI protection is required for receptacles within 6ft of a sink

GFCI protection is available in a couple different styles which would be most practical for a residence?

GFCI receptacle

You are asked to replace a receptacle. On checking the wiring, you find that the wiring method is in conduit and that the wall box is properly grounded. The receptacle is of the older style 2-wire type that does not have a grounding terminal. You remove the old receptacle and replace it with what?

GFCI receptacle

What two types of receptacles are permitted to be used to replace a defective receptacle in an older home that is wired in knob-and-tube wiring where no equipment grounding means exists in the box?

GFCI receptacle outlet

What does IDCI do.

It detects a leakage current

Transients (surges) on a line can cause spikes or surges of energy that can damage delicate electronic components. A SPD device contains one or more that bypass and absorb the energy of the transient.

MOV Metal oxide varistors

Do all receptacle outlets in kitchens have to be GFCI protected? Explain.

No receptacles within 6ft of the sink must be GFCI not outside that radius

The technologies of GFCI and AFCI protection are comparable and will function correctly if installed on the same branch circuit.

True

When installing GFCI and AFCI circuit breakers in a panelboard, it is permissible to connect them to a multi-wire branch circuit.

True but only if it is rated for it

If a person comes in contact with the "hot" conductor and the grounded conductors of a 2-wire branch circuit that is protected by a GFCI, will the GFCI trip off? Why?

Yes it will because the GFCI functions by sensing the unbalanced load between the hot and neutral conductor.

In an old house, an existing nongrounded non-GFCI-type receptacle in a bathroom needs to be replaced. According to 406.4(D)(3), this replacement receptacle shall be ______.

a GFCI-type receptacle or be GFCI protected in some other way like a GFCI breaker

NEC 210.12(A) requires AFCI protection for the branch-circuit wiring that supplies all electrical outlets in specific rooms in dwellings. The branch circuits serving which areas, locations, or rooms in dwellings are not required to have AFCI protection.

bathrooms, unfinished basements, garages, outdoors, crawlspaces

Where must GFCI receptacles be installed in residential garages?

everywhere (except fire alarms and smoke detectors)

A switch that is located inside a bathroom for an outdoor light does not require AFCI protection since the switch is not an outlet as defined by NEC Article 100

false

What color are the terminals of a standard grounding-type receptacle?

green

What special shape and color are the grounding terminals of receptacle outlets and other devices?

green hex 10-32

Is it a Code requirement to install GFCI receptacles in a fully carpeted, finished recreation room in the basement?

no it does not

Extremely long circuit runs connected to a GFCI branch-circuit breaker might result in (nuisance tripping of the GFCI)(loss of protection)(the need to reduce the load on the circuit)

nuisance tripping

In your own words, explain why the Code does not require certain receptacle outlets in kitchens, and basements to be GFCI protected.

smoke and fire alarms

Some line transients are not damaging to electronic equipment but can cause the equipment to operate improperly. The effects of these transients can be minimized by installing ______.

surge protection device

In old house that has two-wire branch circuits (without an equipment grounding conductor, it is okay to install a GFCI receptacle for a microwave oven in the kitchen without also installing an equipment grounding conductor.

true along with a no grounding sticker 110.3(B)

What might happen if the line and load connections of a feed-through GFCI receptacle were reversed?

would not work

A homeowner calls in an electrical contractor to install a separate circuit in the basement (unfinished) for a freezer. Is GFCI protection of the receptacle required?

yes

Are SPD receptacles permitted to be installed in standard device boxes.

yes

Is a GFCI receptacle permitted to be installed as a replacement for old two prong outlets?

yes must be labeled with no ground sticker