Residential Electrician Exam #3 – electrical systems concepts, wiring methods, and exam revision material

Residential Electrician Exam #3 – electrical systems concepts, wiring methods, and exam
revision material



What is the MAXIMUM allowable cord length for the cord supplying a cord-and-plug connected
dishwasher installed under a kitchen counter in a dwelling unit?

a) 11⁄2 feet

b) 2 feet

c) 3 feet

d) 4 feet - ANS ✔✔D: 4 feet

Ref: 422.16(B)(2)(2)



What is the MINIMUM size copper SE cable with type THHW insulation that may be used as
ungrounded, service-entrance phase conductors for a 150 ampere-rated, 120/240-volt,
singlephase, residential service?

a) 1/0 AWG

b) 1 AWG

c) 2 AWG

d) 3 AWG - ANS ✔✔B: 1 AWG

Ref: Tbl. 310.15(B)(6)



For outlet boxes designed to support ceiling-suspended (paddle) fans that weigh more than
_____ pounds, the required marking shall include the maximum weight to be supported.

a) 20

b) 30

c) 35

d) 70 - ANS ✔✔C: 35

Ref: 314.27(D)

, A connection to a driven or buried grounding electrode shall ______.

a) be accessible

b) not be required to be accessible

c) not permitted to be buried

d) be visible - ANS ✔✔B: not be required to be accessible

Ref: 250.68(A), Ex.1



What is the MAXIMUM allowable standard size circuit breaker rating that may be used to
protect a size 8 AWG copper NM-B cable supplying an electric range?

a) 30 amperes

b) 40 amperes

c) 50 amperes

d) 60 amperes - ANS ✔✔B: 40 amperes

Ref: 334.80; Tbl. 310.16



The MAXIMUM number of size 10 AWG conductors permitted in a 4 inch x 11⁄4 inch octagon
metal junction box is _____.

a) two

b) four

c) five

d) six - ANS ✔✔C: five

Ref: Tbl. 314.16(A)



Determine the MINIMUM number of 15-ampere, 120-volt general lighting branch-circuits
required for a dwelling that has 2,600 square feet of habitable space.

a) three

b) four