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Old 08-01-2010, 08:34 PM   #41
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Originally Posted by brian john View Post
11 or 80 to the hour.

Or was it 25 or 6 to 4?
I don't have a flyin' hootenanny as to what your are referring to Marc/Brian.

Last laugh's on me. I know what RCD's are. How did we go from a discussion on IR to RCD'S???????????????????


25, 6 or 4? Chicago??

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Old 08-05-2010, 09:36 AM   #42
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MDShunk, i was brousing on some old megger posts, and I came across one where you say that ,quote" ... Maybe I should write a short essay on using one for troubleshooting one day. "
Hey I'll be the first one to read it if you ever have some time to write it.
I thought that maybe having somebody reminding you about it, would give you a little push
Leave all conductors on the VFD and turn the meter to the maximum setting and you should be just fine!
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Old 08-05-2010, 09:34 PM   #43
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I don't have a flyin' hootenanny as to what your are referring to Marc/Brian.

Last laugh's on me. I know what RCD's are. How did we go from a discussion on IR to RCD'S???????????????????


25, 6 or 4? Chicago??
Well my comment was made after a short post, #20 to be exact, Not as short as NY minute but anything can change.
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Old 12-31-2010, 12:38 AM   #44
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Fluke and Sperry are my meggers.

I megg for 1 min to let stabilize and polarize.

I once megged a 4160 volt motor at .1 meg, and the customer left it in service.

Most these gearless elevator DC motors on the sky scrapers are running under 1 meg. If they're over .1, the customers a happy guy.
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Old 03-04-2011, 03:35 AM   #45
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This is a great book about Megger's.

http://www.maintenancegeeks.com/down...r-astichintime
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Old 03-04-2011, 08:45 PM   #46
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This is a great book about Megger's.

http://www.maintenancegeeks.com/down...r-astichintime
See post #3. Bookmarked that website, handy manuals all over it, ty.

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Old 04-25-2011, 01:40 PM   #47
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I am supprised that a post on how to us a megger properly has gained so much interest. i would expect that as a Journeyman/Master electrician/contractor that the use of a megger would be well understood.
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Old 04-25-2011, 01:43 PM   #48
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I am supprised that a post on how to us a megger properly has gained so much interest. i would expect that as a Journeyman/Master electrician/contractor that the use of a megger would be well understood.
You would be mistaken, many electricians do not own mega meters and will never use one.
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Old 04-25-2011, 04:28 PM   #49
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This might help some -

http://www.allaboutcircuits.com/vol_1/chpt_8/7.html
http://www.allaboutcircuits.com/vol_1/chpt_8/7.html
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Old 04-25-2011, 05:30 PM   #50
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You would be mistaken, many electricians do not own mega meters and will never use one.

And many EC's hire out the meggering to testing firms, for a variety of reasons, spec's, unfamiliar with what the readings mean, saves them money in the short run. Though meggers have come down in price and are available everywhere these days.
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Old 04-25-2011, 07:35 PM   #51
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I hire out for High Pot tests, because of the specialty equipemnt that is used, and the need for third party verification, but not for simple insulation testing and 600v cable.
if your work is primarily residential i could see not using or needing a megger. but, if your a commercial/industiral electrical contractor the proper use of a megger, and knowing how to interpet the readings should perty standard.
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Old 04-25-2011, 10:49 PM   #52
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I hire out for High Pot tests, because of the specialty equipemnt that is used, and the need for third party verification, but not for simple insulation testing and 600v cable.
if your work is primarily residential i could see not using or needing a megger. but, if your a commercial/industiral electrical contractor the proper use of a megger, and knowing how to interpet the readings should perty standard.

Maybe in Europe.
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Old 04-26-2011, 02:33 AM   #53
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Originally Posted by tgreen View Post
I hire out for High Pot tests, because of the specialty equipemnt that is used, and the need for third party verification, but not for simple insulation testing and 600v cable.
if your work is primarily residential i could see not using or needing a megger. but, if your a commercial/industiral electrical contractor the proper use of a megger, and knowing how to interpet the readings should perty standard.

For France side anything over 750 V AC or DC we do either megger or High Pot test depending on the set up. { under 750 V AC or DC we just run the megger that useally take care of it most of the time.}

But Tgreen., The UK and France and few other European countries are pretty strict with testing so we have to use the megger devices pretty often before we can able engerized it.

Merci,
Marc
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Old 04-26-2011, 03:37 AM   #54
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Here in Oz our code book requires all new installations to be megged ,so i would assume all Domestic sparkies (residental) would (should) have a meggar..now referred to as Insulation Resistance Tester....

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Old 04-26-2011, 06:15 AM   #55
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I will say more contractors have a megger now, than in the past. Fully understanding their use, not so much.
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Old 04-26-2011, 11:15 AM   #56
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maybe this is just another reason for a national standardized training and testing for journeyman/apprentice electricians. If i hire a Journeyman and tell him to go megger all the feeders in an MDP and then i have to teach him how to use a megger, i would not be happy.
IMO this should be standard trade knowledge, if you want to be a journeyman. and if people have made it to the journeyman/master level and dont know how to use one, then that is just poor training
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Old 04-26-2011, 01:47 PM   #57
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I would suggest that anyone involved in testing any electrical systems were documentation is required or customers are concerned with adherence to set Standards download the complete NETA documents.

http://www.netaworld.org/



Even though NETA is the standards at which testing is graded by, I think NETA is just a "testing" country club. They make it where an electrical company can not gain membership to NETA. One of it's requirments is :

"A minimum of 75% of the companies gross income must come from the electrical testing and maintenance services listed on the full service check list."

To me this is just another way of saying, we do not care if you are qualified and are capable of testing you will not get certification from NETA unless you are in the good ole boys club.
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Old 04-26-2011, 02:01 PM   #58
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Once having fallen into the wrong hands, an insulation testing device is one of the best sales tools ever invented, especially the ones with neat little red, amber, and green led lights........ Kaching$$$
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Old 04-26-2011, 02:03 PM   #59
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By the way, what I do is no different than what Brian does, only a bit less sophisticated and to a different market........
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Old 04-29-2011, 10:34 AM   #60
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I hire out for High Pot tests, because of the specialty equipemnt that is used, and the need for third party verification, but not for simple insulation testing and 600v cable.
if your work is primarily residential i could see not using or needing a megger. but, if your a commercial/industiral electrical contractor the proper use of a megger, and knowing how to interpet the readings should perty standard.
Is there any need for a Megger in residential ? I've used just a continuity test, for grounds, at the main pnls, or my circuit tracer for locating faults for many years now. My only exp. was when I was a helper to a high voltage High Pot test (hand cranked) for a 4160V line, for insulation weakness.

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