AM2-Insulation Resistance on Motor Circuit.

Dean182 · Dec 9, 2009

Hi Guys,

Finished off my AM2 today. However i have been thinking a few things over. When it came to IR test for the complete dist board, i isolated the motor starter along with the other things that required removing. I'm now thinking i was wrong to do this, and i should have left it turned on, to test to the contactor, as the next IR test was from the starter to the motor, without the motor included. Can anyone shed any light and put me out my misery!

Apache · Dec 10, 2009

*bump*

Hello newbie

Andy™ · Dec 10, 2009

your partly right - you test upto DOL from DB. you then remove connections at motor and IR these. you would also IR motor windings / case

Dean182 · Dec 10, 2009

Great. I did upto the Iso. So missed the 6 inches of cable from iso to contactor. Do you know if that will be a fail? I know it will certainly drop me marks. Yeah i disconnected the connections at the motor end and IR it there, didn't test the motor windings tho because it made it clear to not include the motor itself in the test.

gram1980 · Dec 15, 2009

Dean182

Dont worry about it fella, they dont want you to IR the contactor & control wiring, just the feed to the isolator and the supply to the motor.

I passed mine on fri, bit nervous waitin for results as i C***** my motor up by crossing the control wiring to the remote with the supply to the motor = dead short between phases on power up. Blushing

good luck