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Hi. Yeah carried out continuity also same reading, 0.2 Ohms. Tested the disconnected cable which produced a reading of 4 GOhms each phase to earth. Motor still producing 0.2 ohms each phase to earth. There is no neutral in the system.

Was asked to test a 440V 60 Hz 3 phase Star Configured Water Pump. The supply cables to the pump were 35mm Red Yellow Blue cables coming from a contactor in a panel. The test to be conducted was an IR at 500V between each phase and earth. When conducting the test I was getting a very low...

Jesus...

So that 55-0-55 is simply for protection purposes?

Lurch Thanks mate. I was just getting confused with the 55V aspect. Was looking online but thought it would be better to simply ask someone. Essex1 Cheers.

Hi. Wondering if someone would be able to explain how current flows in a 110V centre tapped transformer system. If both the live and neutral conductors are 55V to earth, how does current flow. It appears that there would be no potential difference between live and neutral if they are both 55V...