Properly connecting an isotaion transformer


I have a single dedicated 20amp circuit for my audio and video equipment. I'd like to connect an isolation transformer. I'm looking for guidance on how to properly connect it. Once its connected, do I still need to run another dedicated circuit to seperate the analog from the digital?

The isolation transformer I'm looking at is a single phase 2.5kva topaz isolation transformer.

Thank you for your help.
vman71

Showing 5 responses by vman71

Since I have a Hubbell 8300igi duplex connector that terminates my dedicated 20amp circuit, could I plug a seperate isolation transformer into each of the plugs? Could this be a configuration to seperate my analog devices from my digital off of one dedicated circuit?
Sean: Thanks for the excellent information. It is really going to help me as well as others who are contemplating using isolation transformers. From the numbers you've provided, I personally need to run two more dedicated 15amp circuits on top of the existing dedicated 20amp. Then place a 2.5kva iso transformer for the amp circuit and a slightly larger than 1kva iso transformer for my source equipment.

Again, thanks for the excellent information!
Sean: How far apart do I need to keep the isolation transformers from each other? And how far from the equipment (TV, Pre-amp, Amp, etc.)?

I'm probably going to end up running 2 more dedicated 20amp circuits (as you've suggested). I'd like to run each dedicated into an isolation transformer and then on the back side terminate into a Hubbell.

Fortunately my system doesn't draw too much current so my isolation transformers don't have to be very big (taking into consideration your comments earlier about overhead). I have the Sunfire Cinema Grand II amp which is only 225x5, small compared to many that are used. Vman
Sean: I posted my system in the "Virtual Systems - Opinions Please" directory of A'gon. My listening room is 15W x 20L x 8H. I usually don't crank the amp too far only because the main speakers are so efficeint (102db sensitivity) that it doesn't take too much to get it loud.

I just bought XLR IC's to go between my amp and my pre-amp. I went with an Acoustc Zen Matrix II (center) Pure Note Epsilon Reference ver4 (mains) and ver3 (rears). All are XLR terminated. I previously was using Monster RCA IC's.

If I cannot do the isolation transformer as my way to provide clean power to my amp, is there another solution you would recommend? I say this because given my space where my equipment is located, I will only be able to have a single isolation transformer for all my equipment both digital and analog. My "bump out" for my equipment is only 8ft wide by 3ft deep.
Sean: Thank you very much for the offer to "burn in" my cables. I'm waiting on one last cable to come in (AZ Matrix XLR IC) and then I'll have all the cables. I would need to check on the cost to ship them to you. If it is not too much, I will ship them to you and cover the return shipping charges. I'm in Northern Virginia, how about you (zip code also)?

Your suggestions about the different ways to improve power delivery to the audio and video devices is appreciated by me and I thank you for your time in offering your technical expertise.

Yes, I'm going to have to "toe" in my main speakers and also angle my center channel down. I've calculated that the apex of the sound from the mains (if they are seperated 10ft) is 13ft. I'll have to use a little geometry to figure out what the angles will be for the mains and the center.

I know that one of the first things I'm going to have to do after set-up is the installation of absorbtive and deflective panels. Wow, this is a fun experience!

Looks like I'll be painting the Man Cave this weekend and then all that's left is the carpet (which I'm not doing thank goodness)! Still shooting for the end of March but will probably be 1st or 2nd week of April.