ABSTRACT
This is used to measure the insulation resistance between live conductors and live conductors and earth. This test is best described as a pressure test applied to the conductor insulation.
The instrument must deliver a current of 1mA on a resistance of 0.5MΩ at 250 volts d.c. for extra low voltage circuits, 500 volts d.c. for low voltage circuits up to 500 volts a.c. and 1000 volts d.c. for circuits between 500 and 1000 volts d.c.
