Hello Darryl,
I tip my hat in honor to your many years working with electricity. 110 volts
was Edison's choice for direct current. Then Tesla/Westinghouse chose higher
voltage alternating current stepped down to 120 volts. See
http://en.wikipedia.org/wiki/War_of_Currents 115-volt AC/DC universal motors in
drills and other tools were fairly common until low-cost induction motors
became widespread.
Best regards,
Joel Davidson
----- Original Message -----
From: Darryl Thayer
To: RE-wrenches
Sent: Monday, October 18, 2010 7:18 PM
Subject: Re: [RE-wrenches] AC voltage in North America
When I was an electrical apprentus back in the late 40's we called it
110/220 then in the fifties the voltage was reised to 115/230 and some time in
the 1960 it was raised to 120 240
Darryl
--- On Mon, 10/18/10, Marco Mangelsdorf <[email protected]> wrote:
From: Marco Mangelsdorf <[email protected]>
Subject: [RE-wrenches] AC voltage in North America
To: "'RE-wrenches'" <[email protected]>
Date: Monday, October 18, 2010, 8:27 PM
I just don’t understand it.
Lots of people—from reporters to homeowners—consistently refer to the
AC voltage in their homes as “110/220.”
Where does this come from?
If North American utilities were putting out power at that voltage
range, they would be in serious trouble.
Anyone able to educate me on this matter?
marco
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