Tweakers' Asylum

RE: Update on my ground loop

67.101.59.190

lrcordell

In Reply to: RE: Update on my ground loop posted by DC STEVE on June 26, 2007 at 18:39:17

Steve,
Glad to hear (pun intended) the ground loop is gone. If I understood the discussion correctly, switching the legs on the breaker for the third circuit is not likely to cure a ground loop--it is for other (EMF, RFI?)noise isolation.

It doesn't sound like you need to check polarity, given that things are fine. But, you may want to purchase a polarity tester from Home Depot or a hardware store the next time you're in one. They are cheap, easy to use (you just plug them in like any other plug), and good to have around. They can also tell you if you have an open ground, for example. Get the kind with the GFCI tester, so that you can test your GFCI circuits.

Louis

Follow Ups:

RE: Update on my ground loop - DC STEVE 19:43:44 06/26/07 (2)
ok, will do.

not sure tho why i dont want that third circuit on the same leg, isn't that the reason i had the ground loop in the first place? which was solved by moving my equipment onto the outlets on the same leg?
- RE: Update on my ground loop - lrcordell 08:57:23 06/27/07 (1)
  All I can do is quote what Al said below:
  
  "Connecting your audio system to outlets wired to both AC legs increases its exposure to RF noise and degrades the purity of the sound, but, if all the neutral wires are installed correctly, you should not experience any audible hum. Something else appears to be wrong."
  
  The fact that the third circuit is on a different leg, all else equal, should not have been the cause of your ground loop.
  
  If it makes you feel better, then have the electrician come back out and switch the third breaker to the other side. He/She won't do it for free, nor should he/she be expected to, unless you originally requested that all three breakers be on the same AC leg. Specifiying dedicated lines does not necessarily imply that they all be on the same leg.
  - so if something else is wrong... - DC STEVE 09:13:47 06/27/07 (0)
    does that mean the electrician didn't install the lines correctly? if not, i'll go back to the drawing board on my end. it's a shame that third line is just going to sit there, unused...

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