[Boatanchors] GFI

[GBrown]

Every time I am taking a bath, the XYL tosses an SX-71 into the tube and its
pluged in. Thank god for GFI's.
Gary
----- Original Message -----
From: "rkerr" <rrkrr at mindspring.com>
To: <kulow at epix.net>
Cc: "'Boatanchors List'" <boatanchors at mailman.qth.net>; "'Mark Bell'"
<bell at blazenet.net>
Sent: Tuesday, December 14, 2004 5:16 PM
Subject: Re: [Boatanchors] GFI


> In my experience, some old electronic equipment items with two-wire
> power cords have power line filter circuits that have 0.01 uF or 0.001
> uF capacitors connected from each of the two power line wires to chassis
> ground.  This effectively floats an ungrounded chassis at half the line
> voltage (via a relatively high impedance at 60 Hz..).  If the chassis is
> then connected to the power system ground, there will be a small
> unbalanced ground fault leakage current through the capacitor connected
> to the hot side of the power line to ground.  Sometimes this is enough
> to trip the GFI.
>
> Bob
> WB4TGG
>
>
> Bob Kulow wrote:
>
> >>Anyone ever run into problems using circuit breakers with
> >>built in Ground
> >>Fault Interrupters (GFI) on circuits powering boat anchors?
> >>
> >>
> >
> ><snip>
> >
> >I have had some problems with a Cutler-Hammer breaker/GFI combination
unit.
> >One fed a garage circuit and would trip whenever I used any brush-type
motor
> >on the circuit (power saw, router, et.).  Eventually I replaced it with a
> >straight breaker and installed a GFI receptacle in the garage.  That
worked
> >Fine with no nuisance tripping.
> >
> >It's also a lot cheaper to install a separate breaker and GFI receptacle.
> >
> >73
> >Bob WA2UEH
> >
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