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Re: [TenTec] High speed washer hum/whine

To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] High speed washer hum/whine
From: "Paul Christensen" <w9ac@arrl.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 4 Feb 2010 20:56:24 -0500
List-post: <mailto:tentec@contesting.com>
And, since were talking about electrical panels and washing machines,
NEC states that the laundry must have a dedicated circuit for the
washing machine, with it's own dedicated neutral and ground wire all the
way back to the load center panel and dedicated breaker for that
circuit. Sorry, my copy of NEC is at work, so I can't quote the section.

Article 210.11(c)(2) requires a residential laundry room to have a dedicated 20A branch circuit feeding exactly one receptacle. No mention is made of a mandatory dryer outlet. Some folks would rather dry their sheets in the wind.

Back to a bit more on-topic discussion -- If pulling a new branch circuit into your shack for amp service, make an effort to pull 4-wire cabling if you even think of using some of the older amps. My two Alphas have been modified to run 4-wire service since the blowers run on 120VAC and, neutral and ground are bonded together (incorrectly) at the Cinch-Jones power connector. The fix for these amps is easy: Just one jumper cut on the CJ connector. Neutral and ground then have their own separate conductor from the serving panel. For these amps, I didn't even have to take a screwdriver to the cabinet for the modification.

Manufacturers did stuff like bonding neutral with ground back in the '60s and '70s and nobody seemed to care. Some folks still don't get the concept when you tell them that the two conductors are routed back to the same potential at the panel.

Paul, W9AC


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