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| Shock Hazard Analysis https://brainfiller.com/arcflashforum/viewtopic.php?f=4&t=127 |
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| Author: | deprico [ Mon May 12, 2008 12:30 pm ] |
| Post subject: | Shock Hazard Analysis |
In doing an arc flash analysis, is it necessary to complete a shock hazard analysis and define the different approach boundaries (other than the flash protection boundary) |
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| Author: | Noah [ Mon May 12, 2008 1:52 pm ] |
| Post subject: | |
Yes, I provide both for my projects. PTW32 from SKM generator boundaries for Arc flash and shock hazard when you select the template 14 or 18 in custom labels |
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| Author: | Catcher13 [ Mon May 12, 2008 3:16 pm ] |
| Post subject: | |
It's not so much that the shock hazard is part of the arc flash study but NFPA 70E requires both a Shock and Flash hazard assesment before live work is done so most people (everyone??) ties them both together and put both on the labels for completeness. |
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| Author: | deprico [ Tue May 13, 2008 5:35 am ] |
| Post subject: | |
Is the shock hazard information generally taken from the NFPA 70E tables, or calculated with software? I have been using easypower and I see nothing about the shock boundaries in the software. |
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| Author: | Catcher13 [ Tue May 13, 2008 7:45 am ] |
| Post subject: | |
I believe all the programs have a data base that contains the approach boundary info from NFPA 70E. The labels should reflect what is found in 70E for Limited, Restricted and Prohibited approach limits. |
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| Author: | wbd [ Fri May 16, 2008 2:00 pm ] |
| Post subject: | |
In EasyPower, when the label are printed both the Flash Hazard and Shock Hazard information is on the label. For example: 1'-9" Flash hazard boundary 1.9 cal/cm2 flash hazard at 18 inches #0 PPE level 0.48 kV shock hazard when cover is removed 3'-6" limited approach 1'-0" Restricted approach - Class 00 voltage gloves 0'-1" Prohibited approach - Class 00 voltage gloves |
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