General Purpose Switch in Hazardous Area
General Purpose Switch in Hazardous Area
(OP)
Does the OESC in Ontario allow the use of a general purpose level switch in a Class 1 Div 1 (Zone 1) location if the circuit is designed with intrinsic safety barrier and wiring methods?





RE: General Purpose Switch in Hazardous Area
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RE: General Purpose Switch in Hazardous Area
I've always used MTL 5011B. It's an isolator as well as a barrier for dry contact switches. Grounding restraints aren'ts as rigorous. You can also talk to the MTL tech support, they're great. http://www.mtl-inst.com/contact/C223
And no, I don't work for MTL -- but a I used to work for a distributor. I'm a big fan of their products and service.
Best to you,
Goober Dave
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RE: General Purpose Switch in Hazardous Area
I believe it will likely be a simple float (micro) switch like you would find on a sump pump.
Why does MTL rate all their digital input barriers for Class 1 Div 1 Group A? What if the location is Group D?
RE: General Purpose Switch in Hazardous Area
RE: General Purpose Switch in Hazardous Area
Best to you,
Goober Dave
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