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Refugee · 6th Jun 2020, 12:32 am

USA pole transformers as far as I know are 110-0-110 volts with all three wires going to the meter.
110V sockets have different blade thickness or spacing.
https://www.plugsocketmuseum.nl/NorthAm1.html

6th Jun 2020, 12:32 am	#17
Refugee Dekatron Join Date: Apr 2012 Location: Worksop, Nottinghamshire, UK. Posts: 5,553	Re: How to identify an unknown transformer. USA pole transformers as far as I know are 110-0-110 volts with all three wires going to the meter. 110V sockets have different blade thickness or spacing. https://www.plugsocketmuseum.nl/NorthAm1.html