What section and automatic to choose when transferring the meter to the entrance?
In connection with the repair in the apartment and the replacement of all electrical wiring, I decided to transfer the electric meter to the entrance panel and change the cable entry to the apartment ... There is a 32 A machine in the entrance panel. An electrician from the management company ordered me to buy a 6 mm cross-section wire (copper) ... I bought the wire and do the work other electricians came ... Having opened the shield, we found out that the input circuit breaker is powered by a 2.5mm wire (aluminum) ... The opening circuit breaker is fused at the wire attachment point ... They recommended buying a 25A circuit breaker. And a wire of a smaller cross section (4mm.) ... What should I do?
Hello! Those. in the entrance entrance automatic machine powered 2.5 mm² of aluminum? So the riser is laid with a large section - it means that from the riser the branch to the machine is replaced with a normal wire (6 aluminum squares). Then you can not underestimate the machine.
Even if you put the machine on 25A why a wire of a smaller cross section? Here, on the principle of porridge you can not spoil the oil ... The cross section can be too large only if the core does not fit into the terminal block. In all machines, 6 mm² intermeddle.
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