>NOT TRUE.
** It's true on my SB-220. When wired for 240V, the third wire (green)
goes to the neutral on the 240v 3-conductor plug and the other end of
this wire goes to chassis. On a 3-conductor 240v circuit, the ground is
the neutral. 0v = 0v.
>
>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@somis.org>
>To: <Ku4uk@aol.com>; "AMPS" <amps@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
>>
>> >....
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
>
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|