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 Post subject: Prohibited Approach Distance
PostPosted: Sat Jun 08, 2013 2:13 pm 
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I have heard that the NFPA is getting rid of Prohibited Approach Boundary. I have tried to search the NFPA website and the ROP link in this forum but could not find anything. Granted I am not familiar with ROP docs so may have missed it.
Anyone comment?

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PostPosted: Sat Jun 08, 2013 2:35 pm 
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wbd wrote:
I have heard that the NFPA is getting rid of Prohibited Approach Boundary. I have tried to search the NFPA website and the ROP link in this forum but could not find anything. Granted I am not familiar with ROP docs so may have missed it.
Anyone comment?

There was another thread that had the link.
The thread is [url='http://arcflashforum.brainfiller.com/threads/2671/'][Here][/url]
You need to set up a login and then you have access to the whole thing.
The Prohibited Approach Boundary has been deleted (as proposed) which will make a lot of people happy.

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PostPosted: Sat Jun 08, 2013 4:38 pm 
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It was utterly confusing because the prohibited and restricted approach boundaries used almost identical verbiage but didn't explain what exactly it was for. In IEEE 516 (the reference source for shock work methods for 70E, OSHA, etc.) they refer to several approach limits but such as with tools, when working from a helicopter, etc.,, but the basic concept is the same as the restricted approach boundary...the actual distance at which a shock is imminently likely plus an additional distance to account for inadvertent movement.


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PostPosted: Mon Jun 10, 2013 6:50 am 
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IEEE 516 is more of a utility document and will guide NFPA and NESC going forward but it is still in progress of change from a committee member. PAD really has no real meaning with the EWP moved to LAB. It is the point at which it is just like touching it but has no real relevance for the 70e world. Some are arguing that the concept of "just as if you are touching it" is still needed so we'll see in two weeks.


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PostPosted: Mon Jun 10, 2013 8:07 am 
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Committee Statement:
Quote:
"The requirement for using shock protective equipment typically begins at the restricted approach boundary. No additional protective equipment is required when crossing the prohibited approach boundary. Previous changes that used the limited approach boundary or arc flash boundary for "triggering" requirements have made the use of this term unnecessary."



I will be happy if this is ultimately eliminated; I think it is no longer necessary and removing this boundary will simplify things. :)


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PostPosted: Mon Jun 10, 2013 8:08 am 

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I was under the impression that the PAD was intended for direction of unqualified workers within a workspace.


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PostPosted: Mon Jun 10, 2013 8:43 am 
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sparksmore wrote:
I was under the impression that the PAD was intended for direction of unqualified workers within a workspace.


Unqualified persons are allowed within the Limited Approach Boundary if escorted by a qualified person

Unqualified persons are not allowed within the Restricted Approach Boundary or the Prohibited Approach Boundary


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PostPosted: Mon Jun 24, 2013 7:53 am 
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Looks like it will be balloted to be removed since there are no additional requirements in the 2012 or in the proposed 2015 versions.


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