today one of the guys from work disconnected the wires going into a motor turn off the breaker feeding it whitch it was like 100 ft. away.put one of the leads from a megger into the wire where the load was and the other into the frame of the panel once he push the button of megger it showed as bad do you guys think he used the megger correctly to test the insulation of the wire

 

From what i understand of your description, he was probably performing insulation test of motor windings w.r.t. Earth. The megger should display at least 2 MΩ for healthy insulation for a motor rated at 415VAC.

In my opinion, the procedure adopted by that person was appropriate, as during meggering process the other auxilliary or control equipments viz. ckt. breakers, fuses, indicating instruments, etc. have to be electrically isolated or switched off for correct readings as well as for instrument and equipment safety standards.

Kind regards,
Shahvir

 

Yes, as a preliminary check. Should be followed up by more isolated checks to see if motor or wiring is the fault.

 

It's the correct procedure to check the insulation resistance of the outgoing cable which goes to feed the motor.the low value of insulation resistance indicates that the cable insulation might be damaged.