Never thought I'd see a bigger input on "washing machine" hardwire than a
Corsair sidetone...
----- Original Message -----
From: "Stuart Rohre" <rohre@arlut.utexas.edu>
To: <ken.d.brown@hawaiiantel.net>; "Discussion of Ten-Tec Equipment"
<tentec@contesting.com>
Sent: Thursday, February 04, 2010 11:06 PM
Subject: Re: [TenTec] High speed washer hum/whine
> Ken and the group,
> I subscribe to "ECM", an Electrical Contractors' magazine. It has a
> monthly feature on Electrical Code application. Generally, in something
> like an existing electrical dryer installation with 3 wires; one being
> the combined neutral/ ground; the installation would be grandfathered.
> Only if the whole house was being remodeled and major changes being made
> to the electrical system requiring a local authority inspection would it
> possibly have to be changed. And even so, the local authority having
> jurisdiction can adopt all or part of either the newest electrical code,
> or a prior issue of the code. (I think there is a limit on how far back
> a code edition can be used.) The code is always changing, usually to
> clarify contradictions and add useful new developments, such as some
> years ago when GFI technology was introduced to protect outlets in at
> risk areas. (Ground Fault Interrupter detects current flow exceeding
> safe limits on the green wire, and trips out that outlet and any beyond
> it on the same circuit.)
>
> If you were to hook up a new 240 volt appliance that does not use direct
> connection of 120 volts to the incoming line, you would have no current
> in the third wire. Since the safety ground is bonded at the main panel
> to the Neutral bus even if you have an older appliance using half of the
> 240 Volt feed for motors, you are still safe.
>
> -Stuart Rohre
> K5KVH
>
>
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