Mains electricity question
Hi all,
I live in spain where the electricity mains are 220V 50Hz. I live about 400 metres from town and have a cable which contains 2 wires with a diameter of 10 (not sure what the ten stands for) that runs to my house and delivers mains current. I supply the third ground wire at site with a buried copper pole.
Recently I have been experiencing problems when running a high amperage device. For example, when I use the oven or the 1 hp water pump, the voltage will drop to below 200 volts. The local electrician recommends that I change cables and use 3 wires with a rating of 25 in copper (or 50 in aluminium) to bring the electricity, still at 220v. Could anyone explain to me what this means in layman's terms? I had thought the three wires would mean 380 volts, but he says no, it would still be at 220v. How could this help? I know that with a thicker cable the voltage drop would be less, but could someone explain about the three wires?
I hope this is coherent.
Thanks.