ECN Forum Forums General Topics of the Trade Non-US Electrical Systems & Trades Distribution and Transmission voltages..

OK. Fair warning… you asked for it. US 60Hz standards are:

120
120/240
208Y/120
240∆/120
480Y/277
600Y/346
4160Y/2400
4800
6900
8320Y/4800
12,000Y/6930
12470Y/7200
13200Y/7620
13800Y/7970
20780Y/12000
22860Y/13200
23000
24940Y/14400
34500Y/19920
46000
69000
115000
138000
161000
230000
345000
500000
765000
1100000