Do you mean a transformer so one side of the mains could be earthed even on
a hot chassis device?
Most test set ups tend to be this way of course, but to do this with the
whole supply to a home would need a very big transformar?
Brian

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"Tough Guy no. 1265" wrote in message
news
I looked this up, I'm asking the question at the top. The replies don't
seem to be able to agree. Any sensible opinions?

http://electronics.stackexchange.com...e-mains-supply

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