Home>Discussions>ELECTRICAL & LIGHTING>Upgrading 2-prong to 3-prong in old 2-wire system
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Jack
Re: Upgrading 2-prong to 3-prong in old 2-wire system
Jack

Oh, by the way the grounded wrist straps were to discharge static electricity which can blow electronic equipment that are completely insulated from ground. But that's a completely different situation and story.
Jack

Re: Upgrading 2-prong to 3-prong in old 2-wire system

So what would happen if there was no ground rod at the transformer and only at the service?

Would it work?

canuk
Re: Upgrading 2-prong to 3-prong in old 2-wire system
canuk

picture by Etch-a-Sketch ........

Jack
Re: Upgrading 2-prong to 3-prong in old 2-wire system
Jack
Lloyd wrote:

So what would happen if there was no ground rod at the transformer and only at the service?

Would it work?

Yes, it would work as it does now. If there was no ground at the transformer and no ground rod connection or bonding at the panel every thing would still work except for the lightening protection, the only difference is you would not get shocked touching a hot while touching a ground.

Here's an easy experiment for you to try. Hook up a 24volt door bell transformer and turn on the 120volt input. Now take a meter and read the voltage from either output leg to ground and you will get no voltage but you will get 24 volts across the legs. Now tie one leg to ground. now you get 0 volts from that leg to ground and 24 volts from the other leg to ground. With out a ground connection there is no current flow to ground period. That's the difference between an isolated system and a grounded system.
Jack

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