What cable to choose for connecting a change house (underground installation)?

Dmitry asks:
Hello. Help with the choice of wire for laying in the ground and its parameters. It is required to electrify a change house 3x5 three bulbs, three sockets. Maximum load kettle electric. The aluminum wire from the pole of the power line 2 wires is sectional; I do not know the cross section. The cable length should be about 50 meters.
The answer to the question:
Hello! Take the cable VVGNG-LS, 2x4.5 or 2x4. More precisely, you can calculate the load using a calculator. I add that it needs to be laid in a pipe, without a pipe you can safely lay armored cables of the VBBSHV type.
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