Absolutes - Professional Inspector TREC Questions and Answers

Absolutes - Professional Inspector TREC Questions and
Answers
CU / Al Wire for 100 AMP breaker?
4 AWG CU ---> 2 AWG AL
CU / Al Wire for 150 AMP breaker?
1 AWG CU ---> 2/0 AL
CU / Al Wire for 200 AMP breaker?
2/0 CU ---> 4/0 AL
CU / Al Wire for 15 AMP breaker?
14 AWG CU ---> 12 AWG AL
CU / Al Wire for 50 AMP breaker?
6 AWG CU ---> 4 AWG AL
Feedback
50 AMP and 60 AMP both go with # 6CU ---> 4 AL
Minimum breaker size for electric water heater?
30 AMP
Minimum breaker size for electric range?
40 AMPS
Minimum breaker size for electric clothes dryer?
30 AMPS
Overhead service clearance for: walkway
10 feet
Feedback: This includes decks and patios (walkable surfaces)
Overhead service clearance for: driveway
12 feet
Overhead service clearance for: roadway (public road)
18 feet
Overhead service clearance for: pool
22.5 feet within a 10 feet radius
Overhead service clearance for: lighting fixture at pool (installed lighting)

, 12 feet
Overhead service clearance for: roof of a pitch of 4/12 or greater
3 feet
Overhead service clearance for: roof of a pitch of 3/12 or less
8 feet
Cord length for 240v window A/C and
Cord length for 120v window A/C
6 feet / 10 feet
Food waste disposal min and max cord length
18" min - 36" max
Range hood max cord length
48 inches (4 feet)
Same as trash compactor
Dishwasher max cord length
78 inches
(6 feet 6 inches = 6 1/2 feet)
Cable installed within _____ vertical and _____ horizontal from attic access needs
to be protected from mechanical damage
7 feet vertical / 6 feet horizontal
Chimney Hearth Extension for firebox less than 6sqf
16" front / 8" to the sides
Chimney Hearth Extension for firebox equal to, or more than 6sqf
20" front / 12" to the sides
Chimney clearance to combustibles
2 inches to the sides / 4 inches back
Includes rafters & joists
Chimney mantel clearance from firebox
6" above firebox
3/2/10 Rule for chimneys?
3 feet above rooftop
2 feet above anything within 10 feet radius