Aug 29, 2009 #1 REC67 Electrical Aug 29, 2009 7 What is the code/norm that allows using a 2 pole contactor in a 3 phase application? (leaving one line "hot", not interrupted) Thanks
What is the code/norm that allows using a 2 pole contactor in a 3 phase application? (leaving one line "hot", not interrupted) Thanks
Aug 29, 2009 1 #2 resqcapt19 Electrical Aug 29, 2001 535 The 2008 NEC says: 430.84 Need Not Open All Conductors. The controller shall not be required to open all conductors to the motor. Click to expand... Upvote 0 Downvote
The 2008 NEC says: 430.84 Need Not Open All Conductors. The controller shall not be required to open all conductors to the motor. Click to expand...
Aug 29, 2009 #3 itsmoked Electrical Feb 18, 2005 19,114 Refrigeration systems do that alllll the time. Keith Cress kcress - http://www.flaminsystems.com Upvote 0 Downvote
Aug 30, 2009 #4 jraef Electrical May 29, 2002 11,366 Associated side note however: All 3 phases must have overload protection. "If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln For the best use of Eng-Tips, please click here -> faq731-376 Upvote 0 Downvote
Associated side note however: All 3 phases must have overload protection. "If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln For the best use of Eng-Tips, please click here -> faq731-376
