On Tue, 03 Jan 2006 20:50:48 -0500, wrote:

On Tue, 03 Jan 2006 17:00:06 -0600, Mark Lloyd
wrote:

I know someone who had an electric dryer installed about 2 years ago
(in a house with no 240V wiring, only 120V). That electrician used a
3-prong connection.


If it is only a 120v load there is only going to be 3 wires. One hot,
one neutral and one ground.

Sorry for the misunderstanding. BEFORE getting the dryer, the house
had only 120V service. The dryer itself required adding a 240V line.

You need the 4th if you have 120 and 240 volt loads in the same
appliance. Two hots a ground and a neutral. Dryers usually have 120v
timers, lights and blower motors with 240v heating elements. Ranges
use 120v lights and timers.
--
Mark Lloyd
http://notstupid.laughingsquid.com

"Democracy is two wolves and a lamb voting on what
to have for lunch. Liberty is a well armed lamb
contesting the vote." - Benjamin Franklin