Marking of Equipment

Electrical equipment approved or listed for use in North America will bear the following information:

1. The class or group of the hazardous location.


2. The temperature code (T1-T6) or the maximum surface temperature of the equipment.

Electrical equipment approved to the IEC standards will bear the following markings:

1. The letter "E", indicating that it is suitable for use in an explosive atmosphere


2. The letter indicating the type of protection used (e.g., "d" for explosion-proof)


3. 3) The group for which the equipment is approved


4. The temperature code (T1-T6) or the maximum surface temperature of the equipment