FWIW _ Don't know if its valid for 220 lines to ham transmitters , but the
new electric range I just bought says " Effective Jan 1 , 1996 the NEC
requires that new construction. (not existing) utilize 4- conductor
connection to electric ranges. "
The three wire leaves a ground strap from the neutral to the range case.
The 4 wire removes the ground jumper to the case and the neutral (white
/bare) then goes to the range connector and the ground to the range case.
Rgds-- Hank K7HP
----- Original Message -----
From: <TexasRF@aol.com>
To: <craxd1@verizon.net>; <amps@contesting.com>
Sent: Sunday, October 02, 2005 3:13 PM
Subject: Re: [Amps] Power cord to use when converting AL-80B to 240 volts?
>
> A common workaround is to cover the white wire end with black tape or heat
> shrink. This was allowed in the NEC book 25 years ago; not sure about
> today.
>
> The use of four wires can be a problem if the existing 240vac outlet has
> only three wires. If three wires worked when the amplifier was
> manufactured why
> can't they work today? If rewiring the amplifier and cord for 240vac cuts
> the
> primary current in half then the power loss is cut into one fourth. What
> is
> wrong with that?
>
> 73/k5gw
>
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