To clarify:
The insulation needs to be greater than the voltage DIFFERENCE, not just the voltage.
For example, if the insulation comes near -200V and carries +1000V, then the insulation must be rated at least 1,200 V.
The insulation needs to be greater than the voltage DIFFERENCE, not just the voltage.
For example, if the insulation comes near -200V and carries +1000V, then the insulation must be rated at least 1,200 V.