| Arc Flash Forum https://brainfiller.com/arcflashforum/ |
|
| Short Circuit Rating of Equipment less than 50Vdc https://brainfiller.com/arcflashforum/viewtopic.php?f=2&t=2447 |
Page 1 of 1 |
| Author: | JBK89UT [ Fri Sep 21, 2012 5:51 am ] |
| Post subject: | Short Circuit Rating of Equipment less than 50Vdc |
I have been asked by my customer how does the NEC apply to a -48VDC system (Gov't office). The question relates to short-circuit rating of equipment feed by a -48VDC battery back-up system. If I remeber correctly the NEC excludes low voltage systems (<72V), which it does not governn, but I can not find this within teh NEC code book. Can anyone asist? Thanks Jack |
|
| Author: | JBD [ Mon Sep 24, 2012 2:15 pm ] |
| Post subject: | |
Effectively, the NEC covers all voltages. It does have a section on power limited systems which has limitations on voltage (usually <30VDC) and current. It is only NFPA70E that has a defined cut off. |
|
| Page 1 of 1 | All times are UTC - 7 hours |
| Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group http://www.phpbb.com/ |
|