Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Discussion Forum

Ground faulting Drill press

Welcome Guest, Log in or Register
Author 
Dunno

09-01-2000 11:10:16




Report to Moderator

A friend has given me his floor standing drill press. BUT he says that if he plugs it into a ground fault protected outlet, it will trip. He says that he has never been shocked by it (except when he had to pay the bill when he bought it). and if he plugs it into a normal outlet it works just fine. anybody have any ideas where to start looking on this thing? he used it in a metal shop; maybe a stray piece of metal in the motor? are there some things I might/should check? something like resistance from each side of plug to ground...

TIA
paul...

[Log in to Reply]   [No Email]
Dunno

09-05-2000 07:00:07




Report to Moderator
 Re: Ground faulting Drill press in reply to Dunno, 09-01-2000 11:10:16  
welp, thanks for the help guys.. I measured the resistance between the plugs and ground (~3megohms) so I then tried it with the switch on or off, and also the light on/off.. not much change..

so I started taking the covers off.. lots and lots of metal dust in there... and low and behold the wires that go to the capacitor (its a cap start) have spots where the insulation is worn very thin, exposing the wires. I am going to fix that and see what happens.

C-ya
dunno.

[Log in to Reply]  [No Email]
big fred

09-01-2000 19:11:36




Report to Moderator
 Re: Ground faulting Drill press in reply to Dunno, 09-01-2000 11:10:16  
Before you do a lot of work on the drill press, check it with a couple different GFCI circuits. It is possible that the GFCI is bad, not the drill press. If this is the case, let your friend know so he can replace his GFCI.



[Log in to Reply]  [No Email]
Bob M

09-01-2000 12:57:09




Report to Moderator
 Re: Ground faulting Drill press in reply to Dunno, 09-01-2000 11:10:16  
Could be a bunch of things. Check first for damaged (cut or wet inside) power cord and cord cap (plug). Make sure the power cord is wired properly at both the cap and switch ends. Black = hot, white = neutral and green = ground. If the neutral and ground wiring are crossed anywhere from the cord cap on down it can cause a GFCI to trip. While you've got the switch box open look for metal turnings/metal dust on the switch body. Likewise open the terminal box on the motor and check for proper wiring and for turnings/dust inside.

If all the above check out OK, then suspect failing insulation in the motor windings. Test by taking an ohmmeter and reading the resistance between either of the motor power leads and the motor frame (with the power cord unplugged!) Meter should read a few megohms or infinity. A reading less than about 30K ohms will leak enough current to ground to trip a GFCI when plugged in (= time to replace the motor!)

Good luck! And I wouldn't run your new press until you get it figured out.

[Log in to Reply]  [No Email]
ltf in nc

09-04-2000 15:51:47




Report to Moderator
 Re: Re: Ground faulting Drill press in reply to Bob M, 09-01-2000 12:57:09  
I agree with BobM with one exception. The old machinery will trip a GFI w/o much difficulty. I would install a good machine to earth ground and I would use it. Having a good ground will provide a path to ground without going through the operator. The leakage required to trip a GFI is less than that contained in a flashlight battery.



[Log in to Reply]  [No Email]
Dunno

09-01-2000 13:24:39




Report to Moderator
 Re: Re: Ground faulting Drill press in reply to Bob M, 09-01-2000 12:57:09  
Thanks. Will check it out... I kinda figured it was something like this but also thought "heck the price is right even if I have to replace the motor" (price is that I have to pick it up)



[Log in to Reply]  [No Email]
Neil

09-05-2000 15:00:28




Report to Moderator
 Re: Re: Re: Ground faulting Drill press in reply to Dunno, 09-01-2000 13:24:39  
Hmm, just have to pick it up, hu?

Well my recomendation is you do not use it at all. I will even store it safly out of harms way in my shop! :)



[Log in to Reply]  [No Email]
Bob M

09-01-2000 14:00:51




Report to Moderator
 Re: Re: Re: Ground faulting Drill press in reply to Dunno, 09-01-2000 13:24:39  
I agree with your "price is right philosophy" - I got my drill press (minus the motor...) the same way!!



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy