Hello Rob, Ideally I would say that the primary of the isolating transformer needs to be hard wired to a switch fused outlet plate.
For normall bench use the arrangements that I have used in the past are that the PE (protective earth) from the electricity supplier is connected to the screen and/or frame of the isolating transformer and that same PE is brought out to a suitable terminal somewhere on the bench where a seperate earth lead is then connected from that terminal to the chassis of the equipement under test/repair. The secondary of the Isolating transformer being then connected to a suitable standard outlet socket but without the earth. This is done to prevent a possible shock if there is an earth/neutral reversal in the plug of the DUT (device under test) ie: someone has wired the plug incorrectly as in a lot off cases the DUT would still work but it's chassis/case would become 240 ac above the PE's earth potential so to speak.
Before acting on any of this info I will try and post a link to an article that can probably explain this a little better, then with that and any others relavent postings from other members you might be able to make an informed choice. Disclaimer: I am not a qualified Electrician (But I can repair radios pretty good)
Lawrence.
For normall bench use the arrangements that I have used in the past are that the PE (protective earth) from the electricity supplier is connected to the screen and/or frame of the isolating transformer and that same PE is brought out to a suitable terminal somewhere on the bench where a seperate earth lead is then connected from that terminal to the chassis of the equipement under test/repair. The secondary of the Isolating transformer being then connected to a suitable standard outlet socket but without the earth. This is done to prevent a possible shock if there is an earth/neutral reversal in the plug of the DUT (device under test) ie: someone has wired the plug incorrectly as in a lot off cases the DUT would still work but it's chassis/case would become 240 ac above the PE's earth potential so to speak.
Before acting on any of this info I will try and post a link to an article that can probably explain this a little better, then with that and any others relavent postings from other members you might be able to make an informed choice. Disclaimer: I am not a qualified Electrician (But I can repair radios pretty good)
Lawrence.
