Electrical Wiring Test 2

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Push-in terminals use what type of wire?

14 AWG

Scientist usually agree on how much ohms of body and contact resistance?

800 to 1000 ohms

What does a GFCI switch do?

Monitors the current balance between the ungrounded "hot" conductor and the grounded conductor

A branch circuit consisting of two or more ungrounded conductors and a grounded conductor.

Multiwire branch circuit

What is the limit on the load of a branch circuits rating?

No more than 80%

3-wire Cable wiring

One Black "hot" One white "neutral" One red "hot" One bare "ground" -2 "hot", 1 "neutral (3-wire)

2-wire Cable wiring

One black "hot" One white "neutral" Bare "ground" -1 "hot", 1 "neutral" (2-wire)

4-wire Cable wiring

One black "hot" One white "neutral" One red "hot" One blue "hot" One bare "ground" -3 "hot", 1 "neutral" (4-wire)

Where do you install lights listed for wet locations?

Places subject to shower spray

What type of wiring device has back-wiring holes only?

Push-in terminals

What do you do for a push-in terminal?

Strip the conductor insulation off for desired length, insert into the hold and it is held in by its internal spring pressure mechanism.

The safe supporting of a ceiling-suspended fan involves 3 issues:

The actual weight of the fan The twisting and turning motion when the fan is started Vibration caused by unbalanced fan blades

Minimum number of lighting branch circuits needed

3 volt-amps per square foot

What a GFCI does not do.

Does not: Protect against electrical shock when a person touches both circuit conductors at the same time, (flows through the person)

Ungrounded "Hot" Conductor

An ungrounded conductor must have an outer finish that is a color other than green, white, gray, or three continuous white stripes

Where are GFCI switches used? Name 5

Bathrooms Garages Outside Kitchen Sinks

Popular colors for Ungrounded "Hot" Conductor

Black, Red, and sometimes Blue

What type of GFCI switch is most common?

Class A

What is the most common type of switch in lighting circuits?

Flush toggle switch

Grounded (Neutral) Conductor

For AC circuits, the NEC requires that the grounded conductor have an outer finish that is either continuous white or gray.

4 Groups of residential lighting.

General Lighting Accent Lighting Task Lighting Security Lighting

What does GFCI stand for? AFCI?

Ground Fault Circuit Interrupter Arc Fault Circuit Interrupter

Where do you install lights listed for damp or wet locations?

If located within the actual outside dimension of the bathtub or shower up to a height of 8ft

What does a GFCI switch do? (Continued)

Trips when current is 6mA or more Won't trip when current is less than 4mA Might trip when current is between 4mA and 6mA Opens in 25mS

Grounded conductors must be what color?

White, gray, or have three continuous white stripes

What are push-in terminals not used with?

aluminum or copper-clad aluminum conductors stranded conductors 12 AWG conductors


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