Grounding Testing of Stage Lighting

Grounding testing is a test method used to test the grounding performance of electrical equipment and systems, in order to ensure that the grounding system can effectively protect equipment and personnel safety, prevent electric shock, equipment damage, and fire disaster.

we need connect negative polr (black cable) with ground line of plug , connect  positive pole (red cable) with screw which on the lamp body , turning on the machine if the pointer indicates 0, its confirmed that the grounding test has been passed.