Is caisson grounding safe?

Is caisson grounding safe?

Is it possible to ground the caisson, which was made under the well. The pipe goes to a depth of about 15 m, the well is working. What are the negative consequences?

Why does the contactor burn out?

Why does the contactor burn out?

Hello. There is a heating boiler 9 kW, a network of 220 volts. Very often the contactor burns out and the contacts burn on it, tell me the reason.

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