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.
Catagóir Coinníoll | Aicmiú Gáis | Gáis ionadaíocha | Fuinneamh Spark Adhaint Íosta |
---|---|---|---|
Faoin Mianach | mé | Meatán | 0.280mJ |
Monarchan Lasmuigh den Mhiana | IIA | Própán | 0.180mJ |
IIB | Eitiléin | 0.060mJ | |
IIC | Hidrigin | 0.019mJ |
Infheidhmeacht:
CT has the widest range of applicability.
Gas environment:
CT is an explosion-proof rating for acetylene and hidrigin levels. 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 explosion-proof level.