IEC LESSON 108 HW EXAM Q&A 2026 STUDY
GUIDE GRADED A+
◉ Wire sizes up through 4/0 are expressed in American Wire Gauge
(AWG). Wire sizes larger than 4/0 AWG are expressed in ___. Answer:
kcmil
◉ One mil = ___ inches. Answer: .001
◉ Particular care has to be taken when making aluminum wiring
connections because when aluminum is exposed to air it oxidizes,
forming a ___ surface coating that prevents good connections.
Aluminum conductors must have the oxide removed and an inhibitor
compound applied to joints to ensure an electrically sound connection.
Answer: non-conductive
◉ The primary reason that Type NM and Type NMC cable have
conductors rated 90°C, even though the ampacity is based on 60°C is
because higher-temperature conductors are needed due to high
temperatures in attics. Answer: True
◉ The rating of a branch circuit is determined by the ___ used for the
circuit. Answer: overcurrent device rating
GUIDE GRADED A+
◉ Wire sizes up through 4/0 are expressed in American Wire Gauge
(AWG). Wire sizes larger than 4/0 AWG are expressed in ___. Answer:
kcmil
◉ One mil = ___ inches. Answer: .001
◉ Particular care has to be taken when making aluminum wiring
connections because when aluminum is exposed to air it oxidizes,
forming a ___ surface coating that prevents good connections.
Aluminum conductors must have the oxide removed and an inhibitor
compound applied to joints to ensure an electrically sound connection.
Answer: non-conductive
◉ The primary reason that Type NM and Type NMC cable have
conductors rated 90°C, even though the ampacity is based on 60°C is
because higher-temperature conductors are needed due to high
temperatures in attics. Answer: True
◉ The rating of a branch circuit is determined by the ___ used for the
circuit. Answer: overcurrent device rating
