Insulation readings

[paulsaunders16]

Hi, I’m confused. I recently carried out insulation resistance test on a 3 phase board I had some weird readings.

I removed all vulnerable bits of kit and tested the dead side of the incomer all readings where good a part from L2 which had a low reading of 2.8M ohms. This was much lower than all other readings.

Any thoughts ?

 

[Wilko]

Hi - I would look at how L2 progresses from that DB, does have sub boards, more circuits, outside lights etc.

 

[dodger421]

L2 tested individually to what? Or was it L2+N to E?

 

[DefyG]

Or between phases? -