[Amps] RE 220 V

[Bill Coleman]

NOT TRUE.

There may be older vintages of the SB-220.  But I looked at an undated
SB-220 schematic and an SB-221 schematic dated 1976.  Both of these clearly
show GROUND to the chassis - the wire is labelled GREEN and the picto-gram
of the plug clearly shows it connected to the ground lug.  When wired for
240V, there is no need for a neutral on an SB-220/221.

If in fact early SB-220s wired neutral to the chassis, they should be
changed.  Just because they did it at one time doesn't make it correct
today.  The Collins KWS-1 shipped with neutral to the chassis and they
should all be changed.  Lots of Johnson and Heath gear shipped with those
deadly fuse plugs - they should be changed!

We need to move on.


----- Original Message ----- 
From: "R.Measures" <r at somis.org>
To: <Ku4uk at aol.com>; "AMPS" <amps at contesting.com>
Sent: Friday, December 05, 2003 9:25 PM
Subject: Re: [Amps] RE 220 V


>
>
> >No one has said anything about the heathkit SB 22O wiring. It has two hot
> >wires to transformer and neutral to chassis
>
> Neutral does not go to the chassis when a 220 is wired for 120V, but
> wired for 240v it does
>
> >....
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