In message
<bn3pr0801mb0979d630986f7da449ab594285...@bn3pr0801mb0979.namprd08.prod.o
utlook.com>, dated Tue, 3 Mar 2015, "Nyffenegger, Dave"
<dave.nyffeneg...@bhemail.com> writes:
I had an application where the tab used for bonding the sheet metal
cover was spot welded to the cover. Inside were conductors protected
at 125A. I was wondering how many spot welds might be needed to ensure
that a ground fault wouldn't simply blow the spots off before tripping
the breaker.
I have seen a case where two spot welds were specified on the grounds
that one is insufficiently reliable. But you simply have to test such
arrangements, and test several samples.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
When I turn my back on the sun, it's to look for a rainbow
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
-
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