[Amps] TL922 Power Plugs

[Carl]

----- Original Message ----- 
From: "Bill, W6WRT" <dezrat1242 at yahoo.com>
To: <amps at contesting.com>
Sent: Wednesday, November 04, 2009 2:51 AM
Subject: Re: [Amps] TL922 Power Plugs


> ORIGINAL MESSAGE:
>
> On Tue, 3 Nov 2009 22:34:40 -0600, "Gary Schafer" 
> <garyschafer at comcast.net>
> wrote:
>
>>
>>If they are both bonded at the appliance both will carry neutral currents.
>>That can raise the appliance case above ground due to voltage drop in the
>>cable. Should neutral and ground become open somewhere in their path that
>>would put full line voltage on the appliance case.
>
> REPLY:
>
> My dense little brain finally got it.
>
> To reiterate: The danger comes when neutral and ground are bonded together 
> at
> the appliance AND both neutral and ground wires back to the service 
> entrance
> become open. Under that circumstance, at least some of the "hot" AC will 
> appear
> on the chassis of the appliance. This assumes that within the appliance 
> there is
> a load of some kind between one or both of the "hots" to neutral. If there 
> was
> no such load, you wouldn't need the neutral in the first place.
>
> On the other hand, if they are NOT bonded together at the chassis and both 
> wires
> back to the service entrance become open, AC will NOT appear on the 
> chassis
> unless there is an actual short between one of the "hots" and the chassis. 
> .
>
> Thanks for sticking with me.  :-)
>
> 73, Bill W6WRT

And after all this is digested there are still millions of clothes dryers 
that run the neutral to the metal frame and connect the 120V motor from one 
leg of the 240V to the frame. When was the last time a housewife got 
toasted?

Carl
KM1H


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