chad1967
Member
- Location
- Little Rock, AR USA
What article states whether PVC is allowed underground in a class2 div 2 location?
PVC underground in class 2 div 2 location
- Thread starter chad1967
- Start date
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petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
us the area under the ground actually classified?
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Chad, I moved your post to Hazardous(Classified) locations.
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
I appreciate the relocation, but petersonra already asked the right question.
kwired
Electron manager
- Location
- NE Nebraska
I second that (third I guess),
Can you have explosive mixture of combustible dusts underground?
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
In some mining applications, but that's subject to a different set of rules. It isn't covered directly by the NEC. There are some applicable MSHA and NFPA mining standards.
As a GENERAL rule, below grade installations are not classified. There are some special specific Class I applications, such as 514.8, that treat below grade "as if" it were classified.
chad1967
Member
- Location
- Little Rock, AR USA
If it ever becomes exposed it will be.
chad1967
Member
- Location
- Little Rock, AR USA
Thank you, sorry about that.
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
I was half expecting petersonra to ask the next question.
Then it would no longer be underground, would it? (Possibly below grade, but that's different)
OR
Under what standard operating conditions would it be underground and then become exposed?
These aren't capricious questions. As I mentioned earlier, buried raceways that are otherwise compliant with Section 300.5 are not generally considered to be in a classified location.
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