Comments on: Tracking Arc Flash in Australia sets worker’s clothing on fire. http://electricalarcflashsafety.com/2009/10/tracking-arc-flash-in-australia-sets-workers-clothing-on-fire/ Your resource for the latest info about electrical and arc flash training and safety. Fri, 24 Feb 2012 18:16:59 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: Hugh Hoagland http://electricalarcflashsafety.com/2009/10/tracking-arc-flash-in-australia-sets-workers-clothing-on-fire/comment-page-1/#comment-1329 Hugh Hoagland Wed, 05 May 2010 17:28:19 +0000 http://electricalarcflashsafety.com/?p=324#comment-1329 The new NFPA 70E standard has several options. It is coming out in a Report on Proposals (final in 2012) which will have the suggested changes. Several papers have been published on this now and they are leading us toward the idea that DC can do about 1.2-1.3 more than a 3 phase fault in AC. The hardest part is fault current calculations for the DC source. I'm on the NFPA 70E DC Arc Flash Taskforce and I offered a proposal to add DC to the tables. This was revised by our taskforce and entered into the record. This will be published in June or July for public comment. I'll have a link to it on the blog and in the newsletter when it is out. Hugh Hoagland The new NFPA 70E standard has several options. It is coming out in a Report on Proposals (final in 2012) which will have the suggested changes.

Several papers have been published on this now and they are leading us toward the idea that DC can do about 1.2-1.3 more than a 3 phase fault in AC.

The hardest part is fault current calculations for the DC source.

I’m on the NFPA 70E DC Arc Flash Taskforce and I offered a proposal to add DC to the tables. This was revised by our taskforce and entered into the record. This will be published in June or July for public comment. I’ll have a link to it on the blog and in the newsletter when it is out.

Hugh Hoagland

]]> By: Ben http://electricalarcflashsafety.com/2009/10/tracking-arc-flash-in-australia-sets-workers-clothing-on-fire/comment-page-1/#comment-1327 Ben Wed, 28 Apr 2010 21:55:52 +0000 http://electricalarcflashsafety.com/?p=324#comment-1327 Anyone have any calculations for DC Arc Flash faults yet? Anyone have any calculations for DC Arc Flash faults yet?

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