One thing I've heard for sure is that you don't want to plug any kind of lamp or other appliance into the outlet of a balanced power transformer, if the switch for that lamp or appliance is a SPDT switch vs. In other words, if the switch only interrupts power on one side, the appliance will still see power coming in from the other half of the transformer. Keep in mind that nearly every load we might ever plug into a balanced power transformer was not designed for balanced power.
So, it would be best to just unplug the component from a balanced power transformer rather than using its own power switch to turn it off.
Better still would be to install a DPDT switch between the balanced power transformer and the appliance. I'm curious about your having referenced some source that says the noise floor is lowered even more 16 to 20 dB , but I'm content with the dB attenuation had with my "unbalanced" transformer.
Update: I found this article on the topic of balanced power. Keep in mind that in the UK, whenever they talk about an "isolation transformer," one can assume they are talking about a a transformer that has a floating-neutral secondary. Just watch any YouTube video on isolation transformers, where the speaker has a British accent, and you'll see that they equate "isolation" with floating-neutral secondaries and they refer to grounded-neutral secondary transformers as something primarily seen in America.
Sorry about this long. Open it in a new tab, then enlarge it. A dedicated Equipment Ground conductor must be run to all equipment and each receptacle.
All receptacles must be protected by a GFCI. The neutral must be bonded per NEC , and must also be connected to the grounded conductor of the circuit that feeds the system. Balanced power systems are restricted to industrial and commercial occupancies. There must be a receptacle having a grounded circuit conductor i.
Isolated ground receptacles are permitted. Click to expand Last edited: Aug 20, It also provides hookup instructions for the models that have terminal strips instead of ready-to-use, three-prong outlets. Here are some helpful, related photos:. Last edited: Sep 10, Last edited: Aug 11, Joined Oct 5, Posts 1, Likes I was just researching these. Thx for the great info. Hi Uncola, You're in for a treat. Happy hunting and remember that you can search for a given model number under the Topaz, Daitron, MGE, or Eaton brands - check the specs before you buy, of course.
Kind of thinking of making a diy one.. Joined Feb 14, Posts 4, Likes 2, You might want to read zilch0md's questions more carefully, most of those things he mentions are almost never implemented in normal audio gear and some like ac leakage current was only recently known about and you need either a battery supply, dual bank supercap supply etc to remove..
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