Allan is correct.
In a 240V 3-wire system (L-N-L), neutral carries no current with 240V loads.
In a *perfectly balanced* 120V system with absolutely equal loads on both L1
and L2, neutral again carries no current. Key here .. absolutely equal loads.
Given unequal loads (the norm), the neutral leg carries current.
Dan
--- On Thu, 5/13/10, Allan Sindelar <al...@positiveenergysolar.com> wrote:
From: Allan Sindelar <al...@positiveenergysolar.com>
Subject: Re: [RE-wrenches] current carrying conductor
To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org>
Date: Thursday, May 13, 2010, 4:51 PM
Marco,
Seems to me he's right. It carries the net current difference between
L1 and L2 from the transformer to the loads.
But not having any EE training, I'm willing to learn better.
Allan
Allan Sindelar
al...@positiveenergysolar.com
NABCEP Certified Photovoltaic Installer
EE98J Journeyman Electrician
Positive Energy, Inc.
3201 Calle Marie
Santa Fe, New Mexico 87507
505 424-1112
www.positiveenergysolar.com
Marco Mangelsdorf wrote:
I have a disbelieving business partner who
believes that the
neutral conductor in a standard 120/240VAC service is a current
carrying conductor.
Could someone please disabuse him of that notion?
Thanks,
marco
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