Seeking help with cable issues
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As the company is adding a new laboratory in Yuyao, it is estimated that 35KW of electrical equipment will be used, all of which operate at 220V; therefore, cables need to be installed now. Our company has 380 and 220 voltage power supplies ； If only the live wire, neutral wire, and ground wire are used, the current is expected to be around 130A, and a 50mm2 cable would be required (right?) ). If I want to use a three-phase five-wire system, thin wires can be used; would 4*25+1*16 work? There’s a question: since I’m using only 220 volts, shouldn’t the current in the neutral wire be the sum of the currents in the three live wires? (Do I still need to use a thick wire?) I heard that vectors and such things are zero; I need an expert to explain this!
The three-phase load should be distributed as evenly as possible; there is only unbalanced current on the neutral wire – isn’t a vector diagram needed in that case?
A three-phase balanced wiring method can be used; if there are two wires, at least 50 is required