Using Explosion Proof rated flow meters in a Class I , Div 2, Group B Area

[bobdoug]

Is it acceptable to connect a 24 VDC power, 4-20 ma signal output flow meter rated as explosion proof and having a explosion-proof NEMA housing into a non-incendive type system without a full run of sealed conduit? Can a short run of sealed conduit transition to PLTC cabling which is routed to an apprpriately limited and rated power supply and DAQ card located in a non-hazardous area?

 

[Smart $]

Refer to 501.15(D) for Division 1, (E) for Division 2.

 

[rbalex]

Is it acceptable to connect a 24 VDC power, 4-20 ma signal output flow meter rated as explosion proof and having a explosion-proof NEMA housing into a non-incendive type system without a full run of sealed conduit? Can a short run of sealed conduit transition to PLTC cabling which is routed to an apprpriately limited and rated power supply and DAQ card located in a non-hazardous area?

In addition to Smart $'s comment, recognize that the flow meter enclosure's explosionproof rating is moot since it is no longer required to be if the system is legitimately nonincendive. [Section 501.10(B)(3)]. Also, depending on the actual boundary, you may need to consider Section 501.15(B)(2).