[CAD_CAM_EDM_DRO] Mill Motor trips GFI outlet

I know the load has nothing to do with the GFI. I understand earth leakage,
yes.

I'm just countering the notion in posts that it's tripping because of an
excessive inductive load, but it's only 1/4hp motor, and so it should be
removed.

Every single item in our house runs through a 63A RCD (30mA) including 300A
welder, 2kW compressor and lots of other stuff. So if it ever trips, there
is a problem to rectify, not a CGI to remove.

Regards
Roland

On 7 November 2012 20:24, Gary Click <garyclick@...> wrote:

> **
>
>
> In the case of a GFI, the load downstream has nothing to do with the GFI
> trip. A
> GFI is no more likely to trip on a 1HP motor than on a 1/50HP based solely
> on
> current draw. The GFI senses the leakage of voltage to ground.
>
> Think of youself standing in water (path to ground), holding a drill with
> a bad
> cord (no ground pin in the plug) and the drill has an insulation leak
> (carbon
> dust from the brushes is bridging from brush holder to frame). What do you
> expect to happen? Or even more simply, the ground on the outlet is a
> little
> dirty. This is when you feel the tingle or "shock" that we have all
> encounted at
> some point. The problem is that the difference between a tingle and fatal
> shock can not be a whole lot.
>
> There is a term that everyone has heard, "Electricity takes the shortest
> path to
> ground" that is not only incorrect but also dangerous to trust. Actually
> electricity takes "every path to ground" and when one of those paths is
> you, not
> matter how slight the GFI opens in 1/2 cycle or so.
>
> The GFI trip is most likely due to the inductive nature of the load, a
> slight
> leak to ground or simply the misapplication of the GFI to the device.
>
> Seek the advise of an electrician and don't heed the guidance of "shade
> trees
> wire benders" including me.
>
> gary
>
> ________________________________
> From: Roland Jollivet <Roland.Jollivet@...>
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Sent: Wed, November 7, 2012 11:10:49 AM
>
> Subject: [CAD_CAM_EDM_DRO] Mill Motor trips GFI outlet
>
> I don't understand the sentiment to ditch the GFI...
>
> I'm by no means a safety freak, buy hey, it's only a 1/4hp DC motor. Think
> of the load of a fridge, or workshop compressor, and they don't trip the
> GFI. And if they do, and as in this case, find the reason, and fix that
> instead.
>
> On 7 November 2012 18:31, jeremy youngs <jcyoungs76@...> wrote:
>
> > **
>
> >
> >
> > is it in a wet area? if not pitch the gfi it was never intended to run
> low
> > impedance inductive loads. it was meant to keep the wife alive when she
> > drops the hair dryer in the privvy. i tried once to do the same thing you
> > are doing and the 25 bucks times 2 in a month led me to replace the gfi
> > with a standard 15 amp outlet no problems in 8 yrs since
> > jeremy youngs
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
>
> [Non-text portions of this message have been removed]
>
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