Mike Raiford wrote:
> A related question. why do some countries use 110 and others use 220?

History, most likely. :-) Whoever does something widespread first tends to 
be at odds with everyone else later, when the flaws in the methods are 
discovered but not worth fixing in an already-widespread system.

> BTW, here in the US I've seen AC voltage expressed as 110, 115 and 120. 

117v RMS, I think is the actual standard. :-)

-- 
   Darren New, San Diego CA, USA (PST)
   There's no CD like OCD, there's no CD I knoooow!

Post a reply to this message