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Lucien Nunes · 27th Jan 2023, 5:46 pm

N/E swap is probably much less common now that many socket-outlets have RCD protection. It cannot go undetected in use as it could before RCDs. It used to be possible for an appliance to work with any of the three mains lead cores connected to neutral, or with all three in the wrong terminals.

27th Jan 2023, 5:46 pm	#47
Lucien Nunes Rest in Peace Join Date: Apr 2008 Location: London, UK. Posts: 2,508	Re: Isolator Transformer Query N/E swap is probably much less common now that many socket-outlets have RCD protection. It cannot go undetected in use as it could before RCDs. It used to be possible for an appliance to work with any of the three mains lead cores connected to neutral, or with all three in the wrong terminals.