Originally Posted by Hopinater
3. Since I know the offending circuit what can be dome to cure the circuit of the loop? What can an electrician do to fix the issue?
Tomorrow I'm going to let these subs off their leash but I have to get the loop fixed first. Any thoughts?
Ok so you feel comfortable enough to use the cheater plug and I won't deter from doing that at least initially...but I would still stress you find a more permanent solution to the problem and avoid using the cheater plug long term. Main reason for me is, if the equipment in use shorts, and somehow catches fire to my home, insurance will be hard pressed to pay for the damages. There's a reason it's called a "Cheater" plug. You are skirting an issue by taking the easy way out, as opposed to addressing the problem directly.
Now let's take a look at why ground loops happen. More often than not it is due to one of two things:
Problem 1) other devices on the same circuit with variable draw current such as minifridges, dimmers, microwaves, ovens, etc.
Solution 1) Pull a dedicated line, or see if an electrician can re-configure your panel to allow for perhaps just the plugs in your HT room be only on their own dedicated run, and put other "stuff" on a different breaker.
Problem 2) and extremely common, is ground loop resultant from an improperly done internet/cable/satellite install where the exterior box grounds to a completely different place than your panel is.
Solution 2) Isolators will work most of the time on your coax, but the real solution is to make sure that any and all of your services that come into the house ground to your main panel. If you want I can snap a pic of what I did to ground my cable/satellite box to my main panel which solved 90% of my issue. There was still a very light hum on the line coming in through the satellite feed, which was probably residual coming into the coax from another TV box in the house that was on a line with something like in Problem 1 (Path of least resistance). One of the satellite coax isolators took care of the last 10% in my particular case.
As far as the "Shock factor" and so many of you thinking it's not a big deal, you obviously haven't had a "Ride the lightning" scenario before. Yea the breakers will kick to prevent anything major 'hopefully ' but if you want to see what it's like, the old fork in the outlet trick will simulate it just fine...