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current leakage in Power Tools

shock!! SHOCK

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5 replies to this topic

#1 mench

mench

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Posted 08 July 2012 - 10:54 PM

Does somebody have a simple YOUTUBE video on how to check for current leakage in power tools with both 2 and 3 prong plugs using a digital multimeter? If not, can someone post one and/or put the procedure in simple steps on a forum?

Thank you for reading my request. I think this is a very important skill for the DIYer.

Mench

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#2 RegUS_PatOff

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Posted 09 July 2012 - 12:53 AM

With power OFF, you could use your OHMeter set to the 20 MegOHM scale (or higher)
and measure the resistance from the power tool case to each of the Line Cord pins.

OR with power applied, and your meter set meter to the lowest milli-amp scale
and read the current from the case to an earth ground, such as the ground terminal of a Wall Outlet.

Some Ground Fault Current Interrupters (GFCI) safety devices trip at about 3ma to 5ma within a few milli-seconds.
Hopefully your power tool should be nowhere near that.

Less than 1/2 milliamp no sensation
1/2 to 2 milliamps Threshold of perception
2 to 10 milliamps muscular contraction
5 to 25 milliamps painful shock (may not be able to let go)
Over 25 milliamps Could be violent muscular contraction
50 to 100 milliamps Ventricular fibrillation
over 100 paralysis of breathing.

That's the reason you should always use GFCI protection with any power tool.
.

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RegUS_PatOff > www.youtube.com/watch?v=oPAY2LsKVEw

#3 mench

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Posted 12 July 2012 - 08:00 PM

My questions are now :
1) What should the ohm readings be?

2) Shouldn't the switch be in the "ON" position?
3) How do you test a plug with 3 prongs and what should the reading be in ohms for the ground prong to the metal of the case with the switch in BOTH the "On and OFF" positions'


Thank You,
Mench

#4 RegUS_PatOff

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Posted 12 July 2012 - 09:14 PM

what are we talking about ?
.

one of my video productions: “Easter Seals: Walk With Me”

every day is Down Syndrome Awareness Day
"A Child Is Waiting" . Burt Lancaster . Judy Garland . 1962

RegUS_PatOff > www.youtube.com/watch?v=oPAY2LsKVEw

#5 Budget Appliance Repair

Budget Appliance Repair

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Posted 13 July 2012 - 05:56 AM

A grasshopper who doesn't know to continue the discussion in the same topic......

RegUS, you should probably merge this question with the previous discussion:
http://appliantology...in-power-tools/
William Burk (Willie)
Willie's Budget Appliance Repair
Eureka, CA 95501

#6 Samurai Appliance Repair Man

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Posted 13 July 2012 - 07:11 AM

Topics merged.





Also tagged with one or more of these keywords: shock!!, SHOCK

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