Chapter 3 review questions
what is the smallest sized wired that can be used in a branch circuit rated at 20 amps.
12 AWG
branch circuit conductors and overcurrent proection for a continuous load shall not be less than
125%
The minimum number of outdoor conductors for a residence is
2 NEC210.52 front and rear of the house
what type of circuit must be provided for receptacle outlets in the kitchen, pantry, dinning room, and breakfast room?
2 or more 20 amp branch circuits
the over current device must not be sized over
20 amps
if the connected load is fixed nomotor, noncontinuos loads, the branch curcuit overcureent device may be sized at
25 amps
a 25 amp branch circuit conductor is derated at 70%. what is the derated ampacity?
25 times .7
what is the unit load per sq ft for dwelling units?
3 volts amps
Laundry equipment outlets are placed
6ft
how many lighting branches are provided in the dwelling?
7 branches
what is the minimum number of 15 amp lighting branch circuit required if the dwelling has an occupied area of 400 ft sq
7 branches
yes or no for areas that have or do not have split wired receptacles
Attic- yes stairway-yes crawl space- yes hallway- yes bathroom- no clothes closet- no
How is the load determined for outlets supplying specific appliances?
Based on the amp rating of the appliance
the receptacles in both bathrooms are to be served by the same 20 amp circuit. True or false
False
outlets in the basement and for the laundry must be _____ protected
GFCI
How are branch circuits rated?
In amps or the setting of the overcurrent device
code about the fire alarms
NEC 210.25
where in code does it say the outlets are not to be connected to the lighting because of overloads by high voltage
NEC210.11 C 3
the code requires that at least one 20 amp circuit feeding a receptacle outlet must be provided for the laundry. May this cirucit supply other outlets?
No
What dimensions are used when measuring the area?
Outside
what spaces are not included in the floor area?
Porches, patios, attics, crawl spaces
for this seperate circuit an additional 1500 volt amps _____ be added to the load calculations for dwellings.
Shall not
How is the minimum number of outlets determined for most occupied rooms?
Should be an outlet every 6ft
if a homeowner has 2 bathrooms the code states that they have to be connected to 20 amp branch circuit and also be on separate circuits. True or false?
True
How is the rating of a branch circuit protective device affected when the conductors used are larger size than called for by code?
Up the amps and up the AWG
how is the required number of branch circuits determined?
amps/ 15
what is the minimum load allowance for small appliance circuits for dwellings? (Nec 220.52 A)
at least 20 amps
In a single family dwelling how is the overcurrent protection for branch circuits required to be provided?
cannot be less than noncontinuous load 125% of continuous load Flexible conductors are to be protected and rating cannot exceed to application
What is the meaning of calculated load?
estimated usage draw in amps per sq ft
how is the total load in volt amps for lighting purposes determined?
ft sq of all habitable spaces times the unit load
Code requires all receptacle installed outdoors to be GFCI protected, except.
if they are not easily accessible and are running snow or melting equipment
homeowner wants a swag lamp, is this required for 20 amp small appliance curcuit
no
no point along the wall shall be 6ft from an outlet, does this apply in an unfinished basement
no
small appliance outlets are _____ included in the 3 volt amp per sq ft calculations
not
the rating of the overcurrent protection device must _________the ampacity of a conductor
not be less than
how many receptacles are required on 13ft wall space between 2 doors
one
when determining the location and number of receptacles required, fixed room dividers and railing ____ considered as wall space
shall not be
What is branch circuit?
the circuit conductors between the final overcurrent protection, protecting the circuit and the outlets
The rating of a branch circuit is based on?
the rating of the over current device
A three way switch must be where in a home with more than 6 risers
the top of the stairs and the bottom of the stairs
how is the total lighting load determinded?
total amps/ nominal volts
is a receptacle outlet required in a home when the hallway is 8ft
yes
is a receptacle required in a bedroom 3ft wall space behind a door that is normally open
yes
