Roll me over, lay me down and do it again.....
Or: Roll her over in the clover, do it again."
WRONG. If the GFCI is tripping because one or the other of the circuit conductors is leaking
to ground, rewiring the motor for 240V will do absolutely nothing to change that -- and hence
absolutely nothing to alter the existing shock hazard.
He's already tried it with multiple GFCIs with no change in behavior. Why would you think
that yet another one would make any difference?
No, it cannot, not in compliance with the National Electrical Code.
circuit and it popped right away.
Obvious conclusion: the problem is not the GFCIs.
protected by a GFCI. I guess all I have to do is finish the basement and I won't need no
In heaven's name, WHY? Isn't it clear already that the problem is the jointer, not the GFCI?
Wrong solution. If the trouble persists, you need to find out what's wrong with the jointer
before "get on with your life" turns into "abbreviate your life" by electrocution. That GFCI is
tripping for a REASON. The reason is that your jointer is leaking current to ground -- which
means that its frame is becoming energized. And *that* means that you could receive a
fatal shock from touching it.
On Fri, 18 Oct 2013 11:14:18 +0000 (UTC), Doug Miller
One thing I haven't seen is to thouroughly inspect the cord for any
potential damage all it takes is a pin hole. Any sign of stress or
compression to the cord could have damaged the internal insulation. If
the cord cap isn't a molded type inspect it as well. If you have a
meter you can check for continuity between ground and either
conductor. Since it used to work OK you do have to be concerned with
a potential hazard.
Regardless, Doug is arguably one of the most informed posters here today
with regard to electrical code issues, and a good deal of
troubleshooting to boot.
Pay attention ... sometimes it is best to let the kibitzing dust settle
Nonsense. If he makes a second, parallel path to ground through
his body, and the case is energized, some of that current *will*
flow through his body. Hopefully, it won't be enough to do him any
Think that through just a bit farther, will you?
The current required to trip a breaker is THREE ORDERS OF
MAGNITUDE greater than the current required to stop a human heart
from beating. It doesn't take nearly as much leakage current to
pose a risk to human life as it takes to trip a breaker.
Wrong. GFCI protection is BASICALLY for the protection of human
life, REGARDLESS of what type of electrical equipment said human
I am the OP (if that means original poster). I very much appreciate all the follow-up. I too am concerned as to why this happens.
I need the weekend to pull the motor and have a look. Some additional info on my set-up:
1. The jointer is plugged into a string of outlets I have mounted on the first floor joists. I am in the basement so the outlets are overhead.
2. The power cord has a molded in plug.
3. The power cord runs straight up from the jointer to the outlet and is protected from abuse. It is mounted next to and in the shadow of the DC ducting.
In conversations I have had, some folks have suggested that motors and GFCI outlets don't play together nice which is why you are warned to not plug your freezer into a GFCI outlet. OK, I accept that but I had several years without an issue.
I sure hope that after I pull the motor and open all the covers, I something loose, or chaffed or covered with a lot of dust. That I could fix. If I find nothing, I'm not sure how to proceed.
As you should be. Motors that have absolutely nothing wrong with them can cause nuisance
trips on GFCIs due to voltage and current being out-of-phase in an inductive load -- and
trips can also be caused by current leakage. As I noted in another post, it doesn't take very
much current to interrupt your heart, and so this needs to be taken seriously.
This is true.
And this is why I think you are right to be concerned.
I think my next step, on finding nothing, would be to remove the motor from the jointer and
see if it still trips the GFCI -- if so, I'd take it to a motor repair shop and ask them what they
make of it.
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