I have a few questions and I would some input.
1. When using a megger to check a wire's insulation should the megger be set above ore below the circuit value?
2. Trolley line's ground can not come in contact with?
3. Resistors over 600v, how would you protect people from this hazard?
4. A power & appliance panel board has 10% of its circuits rated over?
5. What are the three types of iron core transformers?

Thanks
Craig



CT El.Unlimited Contractor
MA Master Electrician
RI El.Contractor