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I am designing a low voltage installation and the customer asked for a cell for a load bank. Now he drew this in 4-phase, but I did not encounter this before. Is this possible? I thought they were always 3-phase.

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    \$\begingroup\$ Show that diagram... Then any errors or whatever may be understood. \$\endgroup\$ – Solar Mike Mar 25 at 9:38
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    \$\begingroup\$ Was it really 4 phase, or just 3 phase + neutral? \$\endgroup\$ – Simon B Mar 25 at 9:49
  • \$\begingroup\$ @SimonB I'm with you on this... \$\endgroup\$ – Solar Mike Mar 25 at 9:52
  • \$\begingroup\$ It was 3-phase + neuter, bad habit of calling it 4-phase. \$\endgroup\$ – JSO Mar 25 at 9:52
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    \$\begingroup\$ @JSO: Be careful with "bad habit of calling it 4-phase." It means that you are missing something fundamental in your understanding. With proper understanding the two would be so different that you couldn't confuse them. \$\endgroup\$ – Transistor Mar 25 at 10:01

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