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Thread: Strange amp draw - heat lamps
03-23-2012, 09:13 AM #14Professional Member
- Join Date
- Aug 2006
Yes, breaker boxes are not usually my cup of tea, but now I have looked at more and see what you guys are talking about.
03-23-2012, 09:28 AM #15
03-23-2012, 02:55 PM #16
SandShark... Just noticed your attachment, are not the phases the same in the horizontal direction (for vertically installed panels) or is there something that haven't seen yet? Per USA NEC 384 (which we also follow in Canada mostly), and the attachment courtesy of "legacypower dot net" in their training materials from Siemens, showing North American standard layouts for single phase (A & B) and three phase (A, B & C). I know we are not marine electrical techs here, but the source popped up on a search...
Sorry all... sent the whole darned file, not just the picture of the load center on page 16. (red-faced!!!) Wondered why the one picture was so big...
Last edited by enb54; 03-23-2012 at 02:59 PM. Reason: Sorry
03-23-2012, 10:18 PM #17
Yeah, you're right. Obviously, my attachment isn't a perfect example, but I posted it more to show the phases on the vertical rather than the horizontal.
03-24-2012, 12:55 AM #18
Anyway, sounds like "tuba" got it all working properly, that's all that matters, we're all here I hope to help each other, not create "issues"...
04-10-2012, 11:26 AM #19Professional Member
- Join Date
- Sep 2006
- River Forest IL
If everything is supposed to be 120, and at a point you're seeing 240 (again assuming wiring is standard US), I'd check all the neutrals-make sure they are dedicated from stem to stern, and not possibly tied into other hots somehow, and make sure all neutral connections are tight-also from point of equipment back to the breaker panel. I've run across problems on only a few occasions, where a loose neutral caused a 120v circuit to feed 240v to the equipment-the first time I saw it I was going crazy trying to figure out where the other side of the 240 was coming from. An electrician friend of mine told me to check for loose neutrals-and I found an iffy neutral connection in a connection box (8 neutrals wire taped together). I had my doubts, but when I squared away the connection point, I was good to go. Another time I remember I just had a loose neutral at the breaker panel-that one was intermittent, and caused popped fuses that also drove more than one tech nuts...literally just a loose screw.
Might not be the ultimate answer to what you're up against now-but I don't mind sharing my "well, I've never seen that before" moments-it's worth a check anyway.
Best of luck-
04-12-2012, 01:03 AM #20