by Grizzly » Thu Apr 05, 2012 8:33 am
Hmmm, I'd be careful on this one.
I'm presuming that the lead passed the earth bond OK, and that a polarity test followed, to validate the IR result.
Did it pass the IR test with >9.99 MΩ (or whatever your tester uses to show IR off-the-scale), or was it a figure somewhere between that and the pass limit?
If it was the former, I think I'd be suspicious of either a wiring fault, or if a polarity test proved has the wiring, then that the surge protection MOVs had failed.
If it was the latter, and a polarity test proved OK, I'd say you've just tested on of those few surge protected leads that do pass at 500V.
No guarantee it will do the same next time, though!
C&G 2377 -01 & -02