Branch Circuits

Question 1

What does the NEC define a branch circuit as?

Answer 1

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

Question 2

What does the NEC define a feeder as?

Answer 2

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

Question 3

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

Answer 3

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

Question 4

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

Answer 4

The rating of the branch circuit

Question 5

What does the NEC define a continuous load as?

Answer 5

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

Question 6

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

Answer 6

80%

Question 7

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

Answer 7

80%

Question 8

What is minimum lighting load for dwellings per square foot?

Answer 8

3 volt amperes

Question 9

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

Answer 9

The general illumination

Question 10

How is the required ampacity determined?

Answer 10

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

Question 11

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

Answer 11

The required ampacity is divided by 15 amperes

Question 12

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

Answer 12

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

Question 13

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

Answer 13

1500 volt amperes

Question 14

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

Answer 14

Six feet

Question 15

What size wall must have a receptacle?

Answer 15

A wall 24 inches or wider

Question 16

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

Answer 16

10 feet

Question 17

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

Answer 17

25 feet

Question 18

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

Answer 18

At least one

Question 19

Do basement receptacle have to be GFCI protected?

Answer 19

Yes

Question 20

Is GFCI protection required for finished basements?

Answer 20

Not Generally

Question 21

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

Answer 21

At least two

Question 22

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

Answer 22

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

Question 23

All receptacles that serve the kitchen countertop must be what?

Answer 23

GFCI protected

Question 24

Kitchen counter top receptacles shall be located where?

Answer 24

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

Question 25

What length of countertop requires a receptacles?

Answer 25

12 inches or wider

Question 26

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

Answer 26

24 inches

Question 27

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

Answer 27

No more than 20 inches

Question 28

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?

Answer 28

GFCI protected

Question 29

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

Answer 29

6 feet

Question 30

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

Answer 30

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

Question 31

Receptacles in the bathroom must be what?

Answer 31

GFCI protected

Question 32

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

Answer 32

6 feet

Question 33

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

Answer 33

It may only serve receptacles in bathrooms

Question 34

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

Answer 34

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

Question 35

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?

Answer 35

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

Question 36

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

Answer 36

The front and back

Question 37

Outdoor receptacles must be what?

Answer 37

Accessible while standing at grade level

Question 38

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?

Answer 38

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

Question 39

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

Answer 39

At least one 15 or 20 ampere GFCI

Question 40

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

Answer 40

At least one receptacle

Question 41

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

Answer 41

Nothing, it is only allowed to feed the garage