[TenTec] High speed washer hum/whine

[Malcolm McLeman]

Never thought I'd see a bigger input on "washing machine" hardwire than a 
Corsair sidetone...

----- Original Message ----- 
From: "Stuart Rohre" <rohre at arlut.utexas.edu>
To: <ken.d.brown at hawaiiantel.net>; "Discussion of Ten-Tec Equipment" 
<tentec at 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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