[TenTec] High speed washer hum/whine

[Gary Hoffman]

Yes....the newest code does indeed require this.

Not all local inspectors do though.

And of course the bathroom (and the kitchen maybe?) have to be on GFI 
circuits as I recall.

Sure is different from the old days.

73 de Gary, AA2IZ


----- Original Message ----- 
From: "Ken Brown" <ken.d.brown at hawaiiantel.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Thursday, February 04, 2010 12:41 AM
Subject: Re: [TenTec] High speed washer hum/whine


> 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.
> Maybe someone else who has a copy of the NEC, or has paid the
> subscription to view it online, can check and confirm whether I
> completely correct on this.
>
> DE N6KB
>
> CSM(r) Gary Huber - AB9M wrote:
>> And if you have more than one electrical panel, only the first panel 
>> (Main
>> Distribution Panel) has a Neutral - Ground bonding screw in place. All 
>> sub
>> panels are to have the neutral - ground bonding screw removed (frequently
>> not done).
>>
>> 73,
>>
>> Gary - AB9M
>>
>> --------------------------------------------------
>> From: "Jim Brown K9YC" <k9yc at audiosystemsgroup.com>
>> Sent: Wednesday, February 03, 2010 4:14 PM
>> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
>> Subject: Re: [TenTec] High speed washer hum/whine
>>
>>
>>> On Wed, 03 Feb 2010 15:27:36 -0600, Stuart Rohre wrote:
>>>
>>>
>>>> The problem may be Variable
>>>> Speed Drives in the appliance, lots of modulated semiconductors
>>>> controlling the motor for "Green" efficiency.  Oh, the laws of
>>>> unintended consequences from the environmentalists!
>>>>
>>> Don't blame environmentalists -- it's lousy circuit design.
>>>
>>>
>>>> There are no guarantees with line filters.
>>>>
>>> This doesn't sound like a line filtering issue, but it DOES sound
>>> like possibly improper connections of neutral and the power system
>>> green wire, or a missing power system green wire, of missing bonds
>>> of station ground to the rest of what's grounded. These improper
>>> connections could be in the shack or at the appliance.
>>>
>>> Some things to check. 1) Make sure that the green wire is bonded
>>> to the chassis at the power supplies, AND where the power supply
>>> is plugged into the AC outlet. 2) Make sure that the chassis
>>> (green wire) is NOT connected to the neutral.  3) Make sure that
>>> your power system ground (green wire) is bonded to everything else
>>> in your station, and that every chassis in your station is bonded
>>> together. 4) Make sure that the common point of your station
>>> chassis bonds (grounds) is tied to the ground rods for your
>>> antenna system, your shack, the power system ground rod, and the
>>> ground for Telco and CATV arrestors.
>>>
>>> Look for #1 and #2 at the appliance that is generating the noise.
>>>
>>> 73,
>>>
>>> Jim K9YC
>>>
>>>
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>>>
>>>
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