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ekstra   ara
 Post subject: Arc Flash Protection Labelling
PostPosted: Mon Mar 16, 2009 2:41 pm 

Joined: Mon Mar 16, 2009 2:37 pm
Posts: 1
Quick question: for labels for arc flash protection (bolted fault) boundaries should we be putting the exact voltage on the labels or just a voltage range?


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PostPosted: Tue Mar 17, 2009 4:39 am 
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Joined: Wed May 07, 2008 5:00 pm
Posts: 823
Location: Rutland, VT
Don't know what you mean by bolted fault when used in reference to the Arc Flash Boundary as the AFB is calculated based on the arcing current.

The voltage on the label should be the nominal system voltage. Think about trying to put the exact voltageon the label - that fluctuates every second or faster.

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Barry Donovan, P.E.
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