When using a megger to test a circuit for grounds or shorts, the meter should be set ____.
A) lower than the circuit voltage
B) at the circuit voltage
C) slightly higher than the circuit voltage
D) a and b only
E) b and c only

Question

Quizplus · Accepted Answer

Meggers are designed to test insulation resistance by applying a voltage higher than the circuit's normal operating level, hence options B and C are correct. Applying a voltage at or slightly higher than the circuit voltage helps in accurately determining the insulation's ability to withstand operational or higher stresses.

When Using a Megger to Test a Circuit for Grounds