Basic Knowledge of Explosion-Proof Electrical Equipment in Explosion-Proof Electric Heaters












I. Selection of Explosion-Proof Electrical Equipment
1. Select the type of explosion-proof electrical equipment according to the area category


































  EN60079-15 NEC500 GB3836.15
Zone 0 ia intrinsically safe electrical equipment and circuits
Zone 1 d, p, e, i, q, o, m Flameproof, intrinsically safe capable of withstanding 2 faults, ventilation type

(Note: The original text had a line break here, but the translation is combined for clarity.)		 d, p, e (only for junction boxes, boxes, single-pin fluorescent lamps, etc.)

i, q, o, m
Zone 2 　(1) Equipment for Zone 1

　(2) "n" type

　(3) Equipment that does not produce sparks during normal operation		 　(1) Equipment for Zone 1

　(2) "n" type

　(3) Equipment that does not produce sparks during normal operation		 　(1) Equipment for Zone 1

　(2) "n" type
Note 1: For special type equipment marked with "S", it should be selected according to the area type indicated on the equipment, and special conditions for installation and use should be noted.
Note 2: According to the actual situation in China, the "e" type equipment allowed in Zone 1 is limited to:

a) Junction boxes and junction boxes that do not produce sparks, arcs, or dangerous temperatures during normal operation, including electrical products whose main body is "d" or "m" type and whose wiring part is "e" type.

(Note: The original text was cut off here, but the translation is provided as is.)