Re: Isolator Transformer Query
Regrettably, the argument that you should earth one side of an isolation transformer secondary and add an RCD has been discussed on here many times. It’s an appealing idea.
See GMB’s post #25 or the first line of Lucien’s post #27 on this thread for an explanation of why this is a bad idea.
Yes, if you earth one sided the secondary there is only one wire with electrocution possibilities. Just like the mains. But if you don’t earth anything on the secondary, there there are no (single) wires with electrocution possibilities.
Of course if you connect yourself across two wires of the secondary you could die, and if you had an earth connection and an RCD, then, as GMB says, the RCD will watch you die.
Leave the secondary with no earth connection, I.e. isolated!
Stuart
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