Discussion
woodypup59 said:
Bearing in mind 110V transformers push out + & - 55V, does it matter which pin on the plug is which - apart from the earth of course !
230v or 110v are the "RMS" voltage.Your AC mains at home has the sine wave swinging between +325v and -325v with the central point of that wave at 0v. The shape of the wave delivers an RMS (Root Mean Squared) AC voltage of 230v.
The voltage at the central point of the wave depends on how a transformer is tapped, it doesn't have to be at 0v relative to earth/ground.
With single phase AC it doesn't matter which wire is which except that for safety reasons appliances have the switch on their "live" side.
Condi said:
Presumably so otherwise the motor will turn backwards, no?
Left to themselves AC motors would start and run in either direction, depending how they feel. However, a device (capacitor or copper ring) is fitted which makes the motor always start in the same direction. Reversing the wires makes no difference. I would suspect some 110V generators and inverters are 0/110Vrms, so it would be best to stick to the convention, in case whatever you wire gets plugging in to one of these.
With the proliferation of solar and battery systems, you may come across situations with more complicated fault detection which might as we say in technical circles 'throw a wobbly' when confronted with a miss-wired appliance.
Sparks will wibble on fro hours about N/E bonding of generators and all that.
For the extra effort of choosing the correct pin, I'd avoid the 'discussion'.
With the proliferation of solar and battery systems, you may come across situations with more complicated fault detection which might as we say in technical circles 'throw a wobbly' when confronted with a miss-wired appliance.
Sparks will wibble on fro hours about N/E bonding of generators and all that.
For the extra effort of choosing the correct pin, I'd avoid the 'discussion'.
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