Electrical Level 2 Module 5 Exam Q&A
100% Solved | Graded A+
NEMA Box Type 1: - ✔✔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: - ✔✔Dust-tight, Rain-tight- Intended to
provide suitable protection against specified weather hazards,
suitable for outdoor applications like construction work
NEMA Box Type 3R: - ✔✔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: - ✔✔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
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, NEMA Box Type 4X: - ✔✔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: - ✔✔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: - ✔✔Hazardous location, class II- areas with
combustible dust this designation is incomplete without a letter
NEMA Box Type 12: - ✔✔Industrial Use- no conduit openings or
knockouts in the enclosure, mounting is by flanges or mounting
feet
NEMA Box Type 13: - ✔✔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
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
100% Solved | Graded A+
NEMA Box Type 1: - ✔✔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: - ✔✔Dust-tight, Rain-tight- Intended to
provide suitable protection against specified weather hazards,
suitable for outdoor applications like construction work
NEMA Box Type 3R: - ✔✔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: - ✔✔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
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, NEMA Box Type 4X: - ✔✔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: - ✔✔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: - ✔✔Hazardous location, class II- areas with
combustible dust this designation is incomplete without a letter
NEMA Box Type 12: - ✔✔Industrial Use- no conduit openings or
knockouts in the enclosure, mounting is by flanges or mounting
feet
NEMA Box Type 13: - ✔✔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
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
