Two pole GFCI's not hard to find at all. Probably best to go to an
electrical supply rather than a DIY home store. Of course the type of panel
makes a difference too. I found out the manufacturer of my original panel
had gone out of the home business - then I found out why (something about
breakers not tripping...). An entire new panel resulted.
~~~~~~~~~~~~~~~~
Bill Coleman N2BC
http://home.stny.rr.com/n2bc
----- Original Message -----
From: "Gary Schafer" <garyschafer@attbi.com>
To: "Bill Coleman" <n2bc@stny.rr.com>
Cc: "Richard" <2@mail.vcnet.com>; "Steve Katz" <stevek@jmr.com>;
<RMead100@aol.com>; "AMPS" <amps@contesting.com>
Sent: Friday, March 08, 2002 11:22 AM
Subject: Re: [Amps] Source for 220V cords
> Yes Bill, a simple rule is "ground should never carry any current".
>
> One note about ground fault breakers, if you are gong to install them on a
220
> volt line they need to be double pole type just like any other 220
breaker. They
> are kind of hard to find I think.
>
> 73
> Gary K4FMX
>
>
> Bill Coleman wrote:
>
> > Ground and Neutral are the same in the MAIN breaker box - not
necessarily in
> > all breaker boxes... A branch circuit (probably quite common for
> > post-construction install of 240V in our shacks) must have the neutral
and
> > ground separated. You should not wire up a device anywhere which
requires
> > neutral (i.e. the neutral is carrying current) to the ground instead of
> > neutral.
> >
> > A slight digression: Ground-fault and arc-fault breakers rely on
separate
> > ground and neutral - or stated differently, they rely on current NOT
being
> > returned on the ground. I would recommend that our shack and workshop
> > branch circuits all be fed by a ground-fault breaker. I feel better
knowing
> > that a milliamp difference in the load between hot and neutral will
likely
> > trip the breaker rather than a 40A overload running up my arm and out to
the
> > frame of a piece of radio junque.
> > ~~~~~~~~~~~~~~~~
> > Bill Coleman N2BC
> > http://home.stny.rr.com/n2bc
> > ----- Original Message -----
> > From: "Richard" <2@mail.vcnet.com>
> > To: "Gary Schafer" <garyschafer@attbi.com>
> > Cc: "Steve Katz" <stevek@jmr.com>; <RMead100@aol.com>; "AMPS"
> > <amps@contesting.com>
> > Sent: Friday, March 08, 2002 7:02 AM
> > Subject: Re: [Amps] Source for 220V cords
> >
> > >
> > >
> > >Richard wrote:
> > >
> > >> >A window air conditioner cord is what you want. They have a molded
plug
> > on
> > >> >them,
> > >> >although they are not usually all that long. Can be found in Home
Depot,
> > >> >Lows or
> > >> >probably most larger hardware stores.
> > >> >
> > >> >By the way I think that a 15 amp 220 plug has one blade turned 90
> > degrees
> > >and
> > >> >the 20 amp plug has both blades 90 degrees from what a standard 120
volt
> > >plug
> > >> >would be.
> > >> >These are all 3 wire plugs. 2 hot and ground. No neutral connection.
I
> > think
> > >> >that the SB220 will run without the neutral on 220 vac.
> > >> >
> > >> Do this and the chassis is not returned to mains neutral/gnd at the
> > >> breaker box.
> > >>
> > >> - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
> > >> www.vcnet.com/measures.
> > >> end
> > >
> > >I am not sure about the SB220 but the SB200 does not require a neutral
> > connection
> > >on 220 volts. The fan is the only 120 volt item in the amp. It gets
> > connected
> > from
> > >one hot side to the center connection of the transformer primary. This
acts
> > as an
> > >auto transformer to give 120 volts for the fan.
> >
> > ? True. Gary. Also, green/ground and white/neutral are the same point
> > in the breaker box.
> >
> > >The chassis ground still goes to
> > >the green wire (center pin) as it did with the 120 volt connection. No
> > neutral
> > >connection is needed as there is no 120 volts as far as the line is
> > >concerned.
> >
> > - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
> > www.vcnet.com/measures.
> > end
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
>
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