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Question:

1.5 square copper wire can load much current and wattage

& Gt; how should the electronic truck scale sensor change?

Answer:

Hello, copper core per square safe current carrying about 6AX1.5 = 9AX220V = 1980W power, 9AX380V = 3420W power, aluminum core for the 4A algorithm Similarly,
5 amps per square, 1.5 square 7.5 am, with 220V voltage, 1650 watts or so. 380V voltage of about 2.8 kilowatts.
In accordance with the general principles of calculation, 1.5mm ?? multi-strand soft copper wire can be safely through the 10A current, if the line is very long, it would be discounted ~ on the wattage, this should be based on the use of voltage level, that is 220V , About 2.5KW, 380V, then, can carry about 5KW ~

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