Safety Precautions for Megger Use

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Twistersister

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Minneapolis MN USA
I've got a crew about to start megging transformers and feeders prior to start-up. Our typical precautions have been
  1. Review meter use principles
  2. Rated gloves (600 V)
  3. Limited approach boundary
Are there any suggestions for additional safety precautions?
 
Twistersister said:
I've got a crew about to start megging transformers and feeders prior to start-up. Our typical precautions have been
  1. Review meter use principles
  2. Rated gloves (600 V)
  3. Limited approach boundary
Are there any suggestions for additional safety precautions?
Click to expand...

When I did this at a new power plant (10 years ago) we didn't do anything different using a megger than we did with a DVOM. When we used a hi-pot things were different.

Having to wear gloves while megging would suck. Especially if you have to record your readings. But if OSHA wants it, I guess we have to do it.

I don't know how much you have played with a megger, but you get WAY more of a shock from a regular old 120 volt circuit than a current limited 500 or 1000 volt megger. I know for sure that 120 volt supply systems can be fatal, but I have never heard of anyone getting killed, or even injured for that matter, from the electricity coming from a megger.
 
K8MHZ--I do know of one guy who got hurt from a megger--although I don't think it was his fault :?--as he was asleep on the bench at the time we touched his elbow and ankle with the leads and spun the handle:angel:--He hit his head on the overhead lockers :ashamed:
 
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