The Difference Between Explosion-Proof Level BT and CT

Explosion-proof rating:

Explosion-proof equipment with a CT4 rating is classified as Exd IIC T4. BT4 explosion-proof equipment is rated as Exd IIB T4, which is a lower explosion-proof rating than CT4 equipment.

Applicability:

CT has the widest range of applicability.

Gas environment:

CT is an explosion-proof rating for acetylene and ഹൈഡ്രജൻ ലെവലുകൾ. If there are gases like acetylene or hydrogen in the environment, CT-rated explosion-proof equipment is required. BT-rated equipment is not suitable for acetylene environments and is only considered a moderate സ്ഫോടന-പ്രൂഫ് ലെവൽ.