What wire and automatic machine should I use to connect a 4.5 kW electric boiler?
Good afternoon! There is an electric boiler with a capacity of 4.5 kW (three heating elements of 1.5 kW each). The permitted power of 10 kW is suitable for the meter. What section is the copper wire connected to the electric boiler and which automatic machine?
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If we are talking about a single-phase network, then the power of 4.5 kW is a current of almost 21 A. For such a load, use a copper wire with a cross section of 4 square meters. mm, circuit breaker for rated current 25 A.