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Branch Circuits Flashcards

1
Q

What does the NEC define a branch circuit as?

A

The circuit conductors between the final overcurrent device protecting the circuit and the outlets

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2
Q

What does the NEC define a feeder as?

A

All circuit conductors between the service equipment, the source of a separately derived system, or other power supply source and the final branch circuit overcurrent device

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3
Q

What must the ampacity of a conductor not be less then?

A

The rating of the overcurrent device protecting that conductor. 210.19 and 210.20

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4
Q

What does the ampere rating of the branch circuit overcurrent protective device determine?

A

The rating of the branch circuit

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5
Q

What does the NEC define a continuous load as?

A

a load where the maximum current is expected to continue for three hours or more

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6
Q

Continuous loads shall not exceed what percent of the branch circuit rating?

A

80%

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7
Q

What is a good percent to not exceed for a circuit conductor and overcurrent protective device?

A

80%

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8
Q

What is minimum lighting load for dwellings per square foot?

A

3 volt amperes

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9
Q

Appliance receptacle outlets in the kitchen, dining room, laundry, and workshop are not to be considered a part of what?

A

The general illumination

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10
Q

How is the required ampacity determined?

A

The total general lighting load in volt-amps is divided by 120 volts

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11
Q

How is the number of 15 ampere lighting branch circuits required in a residence?

A

The required ampacity is divided by 15 amperes

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12
Q

What spaces are to be deducted from the total floor area?

A

Open porches, garages, or other unfinished or unused spaces if they are adaptable for future use. 220.12

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13
Q

What does the NEC state for a minimum of volt amperes for each small appliance circuit and each laundry circuit?

A

1500 volt amperes

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14
Q

What is the maximum distance measured horizontally along the floor between receptacles?

A

Six feet

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15
Q

What size wall must have a receptacle?

A

A wall 24 inches or wider

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16
Q

How long do hallways have to be for a receptacle to be required?

A

10 feet

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17
Q

What distance should receptacles be installed from heating, AC, and refrigeration equipment?

A

25 feet

18
Q

How many outlets must be installed in addition to the laundry outlet in the basement?

A

At least one

19
Q

Do basement receptacle have to be GFCI protected?

A

Yes

20
Q

Is GFCI protection required for finished basements?

A

Not Generally

21
Q

What is the minimum number of 20 amp small appliance branch circuits must supply the receptacles that serve the counter surfaces in a kitchen?

A

At least two

22
Q

What may the two circuits that supply a kitchen also supply?

A

The receptacles in the same kitchen, dining areas, pantries and breakfast rooms

23
Q

All receptacles that serve the kitchen countertop must be what?

A

GFCI protected

24
Q

Kitchen counter top receptacles shall be located where?

A

On or above countertop or work surfaces: on or above more than 20 inches above the countertop work surface
In the countertop work surfaces: Receptacle outlet assemblies listed for use in countertops or work surfaces shall be permitted to be installed in countertops or work surfaces
Below countertop work surfaces: Not more than 12 inches below and not where the work surface extends more than 6 inches beyond the support base

25
Q

What length of countertop requires a receptacles?

A

12 inches or wider

26
Q

Kitchen countertop receptacles should be positioned so that not point along the wall is more than _________ measured horizontally from a receptacle outlet?

A

24 inches

27
Q

What is the maximum height receptacles should be installed above a kitchen countertop?

A

No more than 20 inches

28
Q

125 volt, single phase, 15 and 20 amp receptacles installed within 6 feet of the outside edge of a laundry, utility, wet bar, or similar sinks must be what?

A

GFCI protected

29
Q

In the laundry room one receptacle is required within how many feet of the intended location of the washing machine?

A

6 feet

30
Q

A receptacle must be installed within 3 feet from the outside edge of what in a bathroom?

A

The outside edge of each basin and shall be located on the wall that is adjacent to the basin or basin countertop

31
Q

Receptacles in the bathroom must be what?

A

GFCI protected

32
Q

Receptacles within how many feet of a bath tub and/or shower stall must be GFCI protected?

A

6 feet

33
Q

What is the circuit connected to the 20 ampere circuit feeding the bathroom receptacles allowed to feed?

A

It may only serve receptacles in bathrooms

34
Q

If the circuit supplies a single bathroom what else is it allowed to feed?

A

Outlets for other equipment within the same bathroom are permitted to be supplied

35
Q

No parts of cord-connected luminaries, chain, or cable, or cord suspended luminaries, lighting track, pendants, or ceiling suspended paddle fans shall be installed within a zone of what from the bathtub?

A

They should be located within a zone measuring 3 feet horizontally and 8 feet vertically from the top of the bathtub rim

36
Q

Outlets must be installed outdoors where for one and two family dwellings?

A

The front and back

37
Q

Outdoor receptacles must be what?

A

Accessible while standing at grade level

38
Q

Any deck, balcony, or porch that is accessible from inside the dwelling is required to have a receptacle installed the perimeter of the structure that must be what?

A

Located not more than 6 1/2 feet above the walking surface
GFCI protected
Connected to a 15 or 20 ampere circuit

39
Q

How many receptacles are required to be installed in a garage?

A

At least one 15 or 20 ampere GFCI

40
Q

How many receptacles must be installed for each car space within the garage?

A

At least one receptacle

41
Q

The branch circuit supplying the garage receptacle may also supply what?

A

Nothing, it is only allowed to feed the garage

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