<a%20href=Are shower water heaters being grounded to earth in Thailand?
You can use a 240V GFCI which senses voltage loss on a non-grouded leg ( and assumes voltage is going where it should NOT be going ). This will trip the circuit at 5 milliamps and in 25-40 milliseconds
A.K.A. Residual-Current Circuit Breaker (RCCB) or appliance leakage current interrupter (ALCI).
Or run a ground wire to physical earth so the breaker, fuse, OCPD ( overcurrent protective device ) can referrence ground and trip. But nowhere near as fast, and at high current levels.





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