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From: Larry N. Brown (no email)
Date: Mon Jul 10 2006 - 10:31:40 EDT
----- Original Message -----
From: Larry N. Brown
To:
Sent: Monday, July 10, 2006 9:30 AM
Subject: Re: T&T Power Question
While you are literally correct I, chose my example to illustrate the
interaction of the 2 legs of the 240 circuit and the function of the neutral.
Let's say it's not a boat, not a house but a large building with many, many
circuits, each interacting so that a large number of of loads would be
interacting simultaneously. If the system is well laid out you could remove
the neutral and all would run well. Turn on the waffle iron alone and that leg
might sag to 118 volts and the other would climb to 122 volts. In such a
system, the function of the neutral is twofold: (1) return the small
differential current in a balanced 240 system and (2) carry the entire load of
1 leg when, for whatever reason, the system is not balanced.
Regards.
Larry
----- Original Message -----
From:
To:
Sent: Monday, July 10, 2006 8:47 AM
Subject: T&T Power Question
In my misspent youth, I spent a couple summers wiring houses and an old
electrician once told me, that if a house had a well designed electrical
system, THEORETICALLY, the neutral would carry little, if any load. You
could, once again in theory, snip the neutral and all the 120 loads would
find themselves in series across the 240. The 1500 watt waffle iron on L1
would be in series with the 1500 watt coffee maker on L2. The 240 v electric
hot water heater would be a wash.
Hello Larry
I think that's wrong maybe not in the example you give but in practical use
wouldn't work. If either apliance were turned off there would be no circuit.
And if more than one apliance were on the same leg there would not be enough
voltage to share on a series circuit. In a typical series circuit voltage is
divided in other words if you were to conect two 120V light bulbs in series
across a 240V circuit all is fine. But if you were to conect three the bulbs
would be dim because each bulb is only recieving 80V.
Brian Palmetto FL
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