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 Post subject: Minimal Voltages
PostPosted: Wed Jul 08, 2009 11:53 am 
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Joined: Wed Jul 08, 2009 7:17 am
Posts: 2
Location: Toronto, Ont.
I am really new to Arc Flashing, so please excuse any ignorance.
I've been reading a lot in here about the various regs to help prevent Arc Flashing.
Is there a minimal voltage or amperage that arc flashing is not a concern?
We deal with 120 volt systems "In-house", and any voltage higher, we contact our electrician.

Thank you in advace.


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PostPosted: Wed Jul 08, 2009 11:59 am 
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Joined: Sun Dec 23, 2007 1:44 pm
Posts: 348
Location: Charlotte, NC
Please see Article 130.3, Exception no. 1 of the 2009 - 70E. Hope that helps.


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PostPosted: Thu Jul 09, 2009 5:10 am 
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Joined: Thu Jan 10, 2008 8:49 pm
Posts: 482
Location: New England
50V is the threshold. But let me caution you on one thing. You say above 120V you contact an electrician, as if that relieves you of the responsibility of arc flash. If its your property, you are responsibile for the program and all contractors that work there. You have label requirements for equipment, and an obligation to educate your contractors in regards to your program.


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PostPosted: Thu Jul 09, 2009 7:27 am 
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Joined: Wed Jul 08, 2009 7:17 am
Posts: 2
Location: Toronto, Ont.
Thanks Haze.
Actually, it was my electrician who brought Arc-Flashing to my attention.
His crew has had all the training on it. But like you mentioned, it is our resposability to be aware of it and get some sort of training on it.


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