Electrical system in a residential building. When we use any equipment on one phase the lights on that phase dim down but and the same time the lights on the second phase become brighter.
the neutral of the building is disconnected from the utility mains neutral, that's why you are getting different voltages for different loads call a good electrician to reconnect the neutral And this problem can only happen when the building is connected with a 3 phase electric supply
Someone has split the two phase into two one-phase circuits. Putting a load on one side lowers the voltage potential, which raises it on the other side. This is completely normal.
The voltage on loaded phase dips on the account of starting current of equipment. This problem is specifically critical in case of motors. So the dimming brightening happens because of unbalance is 3 phases of the installation. This condition is completely normal keeps happening always.
