On Wed, 22 Feb 2006 14:31:39 GMT, Ignoramus3408
wrote:

On Wed, 22 Feb 2006 14:20:43 GMT, Joseph Meehan wrote:
Ignoramus3408 wrote:
I have this Black and Decker 450 RPM drill:

http://igor.chudov.com/tmp/450-rpm-drill.jpg

When plugged into a GFCI outlet, it leaks electricity to ground and
pops the GFCI breaker. The leak is substantial, I believe, however
when plugged into a regular breaker (and handled with caution
appropriate for leaks to case), it actually works and does not blow
the breaker. So, I think, the leak is limited in extent.

Let's just say I would not want to be handling that drill nor would I
allow an employee or family member to handle it. It is time to have it
repaired or replaced.

I gotta agree with that!

So... any idea of how to approach repairing it? I suspect that
something very simple is wrong, like related to brushes or some such.

i


My question is, what is the most likely culprit and how to approach
repair of it.

My another question is, what would be a typical application of this
drill. I am trying to decide if I need it for anything.

i

First step is to dissassemble and clean the drill - and with a good
ohm-meter check for shorts to ground from the field winding (quite
common) or the brush holders. It is POSSIBLE the brush holders are
just dirty - conductive brush dust etc on the surface.
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