I recently purchased a fluke insulation tester. (1507 is the model number, I think.) I tested some wiring today and I was getting about 550 megohms between the conductors using 500V test voltage. When I used 1000V test voltage I got 11.5 gigaohms. - I have very little experience using an...

I just bought my first megger and have been experimenting to help me better understand readings. Using a chunk of 14/2 bx I attach one lead to the armour and the other lead to a stripped end of the conductor. On 250 500 and 1000 volt settings my reading is always OL. Being that the megger is...

What is the best voltage range to have in a insulation resistance tester ? my Unit T is 100,50,500,700,1000

hey, Have to megger a panel for a final inspection, it has been a while since i have seen it done. have a few questions i want to make sure about before i do it: 1.hold the main breaker be off? 2.My understanding id that i am to test from neutral to ground, however i am unsure for L1 and L2 if...

Guys, my company Specializes in Critical Power, so we are constantly demo'ing out old equipment to put in new. That being said, we have a lot of used equipment, mainly transformers. They are all in great shape, less than 10 yrs and been in computer rooms supporting minimal loads, working and...

I have come across a 3 phase, 5HP 208v well pump install that is acting up. When i showed up onsite the pump tech's were there and the VFD had just blew off the wall... i have done some low level meggering, it seems like some tests should be done, any thoughts.. I am not very skilled in...