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| Table 130.4(E)(a) Note d https://brainfiller.com/arcflashforum/viewtopic.php?f=2&t=5720 |
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| Author: | mitchpali [ Wed Aug 02, 2023 10:06 am ] |
| Post subject: | Table 130.4(E)(a) Note d |
If I am located in an area that is above 3000' in elevation how do I calculate or adjust my Restricted Approach Boundary? |
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| Author: | wilhendrix [ Mon Aug 28, 2023 7:10 am ] |
| Post subject: | Re: Table 130.4(E)(a) Note d |
I don't think there is any modification for altitude. |
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| Author: | w5m [ Mon Sep 25, 2023 10:26 am ] |
| Post subject: | Re: Table 130.4(E)(a) Note d |
As the OP has implied, Note d under Table 130.4(E)(a) in NFPA 70E-2024 states that... Quote: The restricted approach boundary in Column 4 is based on an elevation not exceeding 900 m (3000 ft). For higher elevations, adjustment of the restricted approach boundary shall be considered. You need to use the Altitude Correction Factor specified in Table R-5 of OSHA 1910.269... - search for references to "Table R-5" at this URL: https://www.osha.gov/laws-regs/regulati ... 0/1910.269 (Table R-3 explains how to use the correction factor from Table R-5) |
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| Author: | kyle2022 [ Tue Feb 06, 2024 11:35 am ] |
| Post subject: | Re: Table 130.4(E)(a) Note d |
It is important to note that 2024 NFPA 70E Table 130.4(E)(a) Note d indicates that the restricted approach boundary in Column 4 is based on an elevation not exceeding 3000 ft. This very much seems like it applies to all voltage levels. If you look in OSHA 1910.269 Table R-3, it clearly indicates that the "altitude correction factor" is not used for voltages from 50V - 5kV. As such, do we assume that the voltage correction factor does not have an impact for voltages less than 5.1kV? |
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