[Amps] what is a 4 wire 240VAC service?

[Mike]

110/120 volts was basically decided upon for political reasons in the USA
and not technical reason.

-Mike


-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Roger Parsons
Sent: Sunday, April 03, 2011 5:28 PM
To: Amps
Subject: Re: [Amps] what is a 4 wire 240VAC service?

There are a couple of things I don't understand: :-)

(1) When it became clear, probably close to 100 years ago, that 120V was too
low a voltage to efficiently power room (or tubes with handles) heaters and
similar equipment, why did North America not follow the rest of the world
and move to a 230V system? That is, a 3 wire 230V AC service.

(2) What bright spark decided that black was a good colour choice for the
hot wire?

Actually, there are many other things I don't understand, but those will do
for now.

73 Roger
VE3ZI

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