Class I
Class 1 locations
NEC 501.1
dusttight
NEC 502.10(B)(4)
Class III locations
NEC Article 503
Intrinsically Safe Systems
NEC Article 504
What is a Class I location?
NEC 500.5 (B)
Conduit Seals, Class 1, Division 1
NEC 501.15(A)
Flexible Cords - Class II, Division 1 and 2
NEC 502.140
All boxes and fittings shall be ________.
dusttight
NEC 503.10(A)(2)
What is does intrinsically safe mean?
NEC 100 Definitions
What is a Class II location?
NEC 500.5 (C)
Code requiring explosion proof boxes and fittings
NEC 501.10(B)(4)
Luminaires for fixed lighting in Class II, Division 2 locations shall be protected from __________.
physical damage
NEC 502.130(B)(3)
Give three types of approved wiring methods.
NEC 503.10(A)(1)
What color must intrinsically safe circuits be?
Light blue
NEC 504.8(C)
This protection technique shall be permitted for Class I, Division 1 or 2 locations.
Explosionproof Equipment
NEC 500.7 (A)
What shall the thickness of the compound be not less than?
5/8 in.
NEC 501.15(C)(3)
Receptacle and Attachment Plugs, Division 2
NEC 502.145(B)
Ventilating piping for motors must be lead directly to a source of clean air outside of buildings. (Find the code)
NEC 503.128 (1)
Conductors of intrinsically safe circuits must be separated by at least ________ from conductors of nonintrinsically safe circuit.
2 in.
NEC 504.30(A)(2)(1)
How many threads must be fully engaged in a hazardous location?
5
NEC 500.9(E)(1)
Luminaire stems not longer than ______ must have permanent and effective bracing against lateral displacement.
12 in.
NEC 501.130(A)(3)
The flexible cord does not exceed 900 mm (3 ft), is of a type listed for extra-hard usage, or if listed for hard usage is protected by location. (Find the code)
NEC 502.150 (B)(5)(2)
Ventilating pipes must have a thickness not less than ________.
0.021 in.
NEC 503.128
Assessment for T4 Classification According to Component Size and Temperature
NEC Table 504.10(D)
Define a simple apparatus.
NEC Article 100 Definitions