4 ms·
As a non-electrican, i thought we moved to polarized plugs in the us because it's safer to have switches on the live wire and not neutral so that the system isn
by jimktrains2 5y ago
As a non-electrican, i thought we moved to polarized plugs in the us because it's safer to have switches on the live wire and not neutral so that the system isn't "live" when the power is off.
- jacquesm 5y agoThat would be a false sense of safety. You simply should use a double pole switch if that is a valid concern, and if you are working on a device you shouldn't switch it off but unplug it, and if it is hardwired trip the breaker for that circuit and lock it out.
- jacquesm 5y agoTo expand a bit on that: 230/240V is commonly two legs of a 'delta' wired transformer, there is no 'neutral' in that case, you only have that when you have a transformer in 'star' configuration.