Flex Couplings in Class 1 Div 2 Group D - Areas

[Energy +]

The manufacturer promoves the Explosion Proof Flex Couplings in Class 1 Div 2, in a WWTP plant is mandatory the Explosion Proof Flex Couplings in Div 2? between JB with Explossion Proof seal and PH meter well?

 

[rbalex]

The thing to remember is whether the meter enclosure is required to be explosionproof or not. In Division 2 that depends on the equipment it encloses. [Section 501.10(B)(4)] If required, a seal must be installed within 18” along the raceway path and only certain fittings are permitted between the enclosure and the seal. [Section 501.15(B)(1)(1)] A listed explosionproof flexible coupling is suitable. Otherwise, wiring only needs to comply with Section 501.10(B).