Wouldn't a simple power strip plugged into a two prong cheater plug essentially be isolated and therefore safer when working on electronics?Ĭheater cords were made in polarized and non-polarized versions. Pics, Bold & underlined text, are usually links. And the resulting device should look like this. This way, you know there is nothing there but a 115 Volt, AC transformer secondary, that is "floating" with respect to the rest of the world. So what you need to do is to verify that the transformer secondary is NOT connected to anything but the two blade sockets on the output receptacle, and that the ground pin has no connection, its just floating. The resulting device looked like this, known today as a "Hospital rated Isolation transformer", The device shown DOES NOT provide a power source that has no "connection" to anything else in the world. From an electrical power distribution point of view, NEC required Ground be carried through to the output power receptical, and, "Neutral" had to be re-established, by bonding one end of the secondary winding to "Ground". The most practical approach was to simply incorporate a Faraday shield into power transformers to attenuate, thereby more or less "isolate" the life support systems from the "noise" on the AC line. Totally unacceptable!! A method of "isolating the noise" from "life support" had to be found. The resulting electrical line noise and voltage spikes generated by these systems switching on and off, became quite serious, in that the noise and spikes on the power lines could cause disruption of, or completely disable, critical "life support" electronics. So AC/DC radios, AKA "AA5s" went the way of the buggy whip, the flat head Ford, and drum brakes.Īt the time more and more sophisticated, sensitive electronics was finding its way into medicine, hospitals became ever larger, and their requirements for ever higher power consumption for air conditioning, lighting, and other systems, grew with them. Then, in 1957(I think), UL said it would no longer declare as "safe", any electronic device that didn't incorporate an internal power isolating transformer. It provided an AC power source which had no "connection" to anything else in the world, and schematically it looked like this.
#Ground isolator power strip how to#
Which Im still unclear as what causes a grounding issue and how to fix it without using a ground lift switch or converting from a 3 prong to a 2 prong,which both seems like band aids to me.LONG, Long, long ago, When all AC power in American homes consisted of two wires and not three, an isolation transformer was simply a two winding affair with a turns ratio of 1:1. I dont see why I should have to buy hum eliminators or even have to use a ground lift switch, when the furmans are supposed to take any noise off the power lines,protect my equipment and correct grounding issue noise. I just know I am getting very irritated because I bought 5 power conditions that now seem like they are not doing much of anything. Some one told me that power strips from office max are quiet but I dont know he was referring to hum or or that they get rid of other kind of noise,like static. Isnt the furmans supposed to have hum eliminators in them? Is hum a ground problem and can ground problems introduce different noise issues other then hum?ģ.And do Hum eliminator adapters do the same thing as ground lifts or whats the deal them?Ĥ.And are there any power strips that have hum eliminators built in.
And what are the other causes for noise besides hum?Ģ. I have everything going into Furman power conditioners.ġ.But the question is why am I having to use ground lift switches to reduce noise?Is this what the furman is supposed to be doing? Correcting ground noise issues. So IM trying to solve all my noise issues.
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