Fume Hoods

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Artemis

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Can any one lead me to a NFPA Article concerning whether fume hoods need expolsion proof wiring. It also seems that NFPA 45 (which I don't have) may provide the answer. Thanks in advance for any help.
 
Hopefully some more data can stimulate a response. The hoods are located in a manufacturing facility. The lab is to test product and the hoods are located in a non-hazardous space. The units were supplied with explosion proof switches and receptacles (outside of the chamber hood), yet they are in the same space as normal fixtures, receptacles etc. So would the chemicals being used in the hood drive the rating per Article 500? If the chamber is a controlled environment, why would devices ouside the chamber need to be explosion proof if the lab is not a classified as a hazardous area?
 
Artemis said:
Hopefully some more data can stimulate a response. The hoods are located in a manufacturing facility. The lab is to test product and the hoods are located in a non-hazardous space. The units were supplied with explosion proof switches and receptacles (outside of the chamber hood), yet they are in the same space as normal fixtures, receptacles etc. So would the chemicals being used in the hood drive the rating per Article 500? If the chamber is a controlled environment, why would devices ouside the chamber need to be explosion proof if the lab is not a classified as a hazardous area?
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You may get better responds if you post in the " Hazardous Locations " Forum, there are

some real Experts there.
 
The fume hoods we hook up don't need explosion proof wiring methods,
unless the hoods are located in a 500 area,which 99% of the time aren't.
Sometimes we will hook up a EP hood that the company bought dirt
cheap from another pharmaceutical company that had their drug fail
the FDA tests and are forced to close.
 
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