Electrical Level 2 Module 5 Exam Test Guide Questions and Answers
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Course
NCCER Electrical
Institution
NCCER Electrical
NEMA Box Type 1: - Answer-General purpose- prevents accidental contact, good for indoors when not exposed to special conditions, protects against falling dirt but is not dust-proof.
NEMA Box Type 3: - Answer-Dust-tight, Rain-tight- Intended to provide suitable protection against specified weathe...
Electrical Level 2 Module 5 Exam Test
Guide Questions and Answers
NEMA Box Type 1: - Answer-General purpose- prevents accidental contact, good for
indoors when not exposed to special conditions, protects against falling dirt but is not
dust-proof.
NEMA Box Type 3: - Answer-Dust-tight, Rain-tight- Intended to provide suitable
protection against specified weather hazards, suitable for outdoor applications like
construction work
NEMA Box Type 3R: - Answer-Rain-proof, sleet resistant- protects from rain, and resists
damage from exposure to sleet, designed with conduit hubs, external mounting and
drainage
NEMA Box Type 4: - Answer-Water-tight- designed to meet hose test, 10' away for 5
minutes at 1" nozzle min 65 gallons per minute, there should be no water leakage under
these conditions
NEMA Box Type 4X: - Answer-Water-tight, corrosion-resistant- same as above except
that they are made out of a highly corrosive resistant material, ideal for meat packing
and chemical plants where steel would be destroyed over time
NEMA Box Type 7: - Answer-Hazardous location, class I- where flammable gasses or
vapors are or may be present in the air and could cause an explosive or ignitable
mixture, circuit interruption occurs in the air
NEMA Box Type 9: - Answer-Hazardous location, class II- areas with combustible dust
this designation is incomplete without a letter
NEMA Box Type 12: - Answer-Industrial Use- no conduit openings or knockouts in the
enclosure, mounting is by flanges or mounting feet
NEMA Box Type 13: - Answer-Oil-tight, dust-tight- made of cast iron, gasketed, or
permit the use in the same environment as type 12 although mounting is done by blind
holes
Pull and junction boxes must be sized, installed, and supported to meet the
requirements of - Answer-NEC article 314
Long runs of conductors should NOT be made in one pull. - Answer-True
Long runs of conductors should be made in one pull. - Answer-False
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