NEC Comprehensive Questions
(Frequently Tested) with Verified
Answers Graded A+
The service disconnecting means, and main over current protection when located inside a
building:
A) is permitted to be located in a clothes closet, B) Not permitted in a kitchen, C) Required to be
located within 6ft of point of the service entrance to the building, or D) As close as possible
(practical) where the service entrance conductors enter the building. - Answer: D) As close as
possible (practical) where the service entrance conductors enter the building.
230.70(A)(1)
A multi-wire branch circuit shall be provided with a means _______.
A) To disconnect ungrounded conductors independently. B) That will simultaneously disconnect
all ungrounded conductors at the point where the branch circuit begins. or C) To open the
neutral and ungrounded conductor. - Answer: B) B) That will simultaneously disconnect all
ungrounded conductors at the point where the branch circuit begins. 210.4(B)
When utilized as outside branch circuits and feeders, overhead conductors for 600v or less, for
spans up to 50 feet, shall not be less than _____copper.
A) No. 14 B) No. 12 C) No. 10 or D) No. 8. - Answer: C) No. 10 225.6(A)(1)
The disconnecting means for each supply permitted by 225.30 shall consist of not more than
_____ switches or breaks. A) 4 B) 5 C) 6, or D) 7. - Answer: C) 6 225.33(A)
Small appliance branch circuits shall NOT supply?
A) Water pump B) Switched light circuit C) Gas ignitor, or D) Electric clock. - Answer: B)
Switched light circuit. 220.52
, What are the four vertical clearances for services, and what are in each group? - Answer: 10ft-
Service entrances to buildings. Sidewalks.
12ft- Driveways, commercial areas not subject to truck traffic where voltage is below 300v to
ground.
15ft- Those listed in 12ft above 300v to ground.
18ft- Public streets, alleys, roads, parking areas subject to truck traffic.
230.24(B)
All 125v, 15 and 20 amp receptacles in an unfinished basement must be _____ protected.
A) GFCI B) Arc flash C) Physically or D) Permanently - Answer: A) GFCI 210.8
What is the minimum required number of branch circuits in a dwelling, and where are they
located? - Answer: 4. 2 small appliance, 1 laundry, and 1 bathroom. 210.11(C)
How many additional volt-amperes need to be added per every two feet of track lighting?
A) 50 B) 100 C) 150 D) 200 - Answer: C) 150 220.43(B)
An outlet for servicing a rooftop electrical A/C unit shall be within ______ft from unit.
A) 10 B) 15 C) 20 or D) 25 - Answer: D) 25 210.63
No horizontal point along the wall of a kitchen counter top may be more than ______in. from a
receptacle outlet.
A) 8 B) 10 C 16 or D) 24 - Answer: D) 24" 210.52(B)(1)
All grounding pipe and rod electrodes must have at least ________ft in contact with the soil.
(Frequently Tested) with Verified
Answers Graded A+
The service disconnecting means, and main over current protection when located inside a
building:
A) is permitted to be located in a clothes closet, B) Not permitted in a kitchen, C) Required to be
located within 6ft of point of the service entrance to the building, or D) As close as possible
(practical) where the service entrance conductors enter the building. - Answer: D) As close as
possible (practical) where the service entrance conductors enter the building.
230.70(A)(1)
A multi-wire branch circuit shall be provided with a means _______.
A) To disconnect ungrounded conductors independently. B) That will simultaneously disconnect
all ungrounded conductors at the point where the branch circuit begins. or C) To open the
neutral and ungrounded conductor. - Answer: B) B) That will simultaneously disconnect all
ungrounded conductors at the point where the branch circuit begins. 210.4(B)
When utilized as outside branch circuits and feeders, overhead conductors for 600v or less, for
spans up to 50 feet, shall not be less than _____copper.
A) No. 14 B) No. 12 C) No. 10 or D) No. 8. - Answer: C) No. 10 225.6(A)(1)
The disconnecting means for each supply permitted by 225.30 shall consist of not more than
_____ switches or breaks. A) 4 B) 5 C) 6, or D) 7. - Answer: C) 6 225.33(A)
Small appliance branch circuits shall NOT supply?
A) Water pump B) Switched light circuit C) Gas ignitor, or D) Electric clock. - Answer: B)
Switched light circuit. 220.52
, What are the four vertical clearances for services, and what are in each group? - Answer: 10ft-
Service entrances to buildings. Sidewalks.
12ft- Driveways, commercial areas not subject to truck traffic where voltage is below 300v to
ground.
15ft- Those listed in 12ft above 300v to ground.
18ft- Public streets, alleys, roads, parking areas subject to truck traffic.
230.24(B)
All 125v, 15 and 20 amp receptacles in an unfinished basement must be _____ protected.
A) GFCI B) Arc flash C) Physically or D) Permanently - Answer: A) GFCI 210.8
What is the minimum required number of branch circuits in a dwelling, and where are they
located? - Answer: 4. 2 small appliance, 1 laundry, and 1 bathroom. 210.11(C)
How many additional volt-amperes need to be added per every two feet of track lighting?
A) 50 B) 100 C) 150 D) 200 - Answer: C) 150 220.43(B)
An outlet for servicing a rooftop electrical A/C unit shall be within ______ft from unit.
A) 10 B) 15 C) 20 or D) 25 - Answer: D) 25 210.63
No horizontal point along the wall of a kitchen counter top may be more than ______in. from a
receptacle outlet.
A) 8 B) 10 C 16 or D) 24 - Answer: D) 24" 210.52(B)(1)
All grounding pipe and rod electrodes must have at least ________ft in contact with the soil.
