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I work in the power distribution industry and recently came across a 3-phase LV circuit with "twin-wired neutral" (i.e. two neutral cables inter-winded, therefore five cables total). What would be the point of such a neutral configuration? Would this be to carry more current due to neutral currents/unbalanced phases?

Cheers!

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    \$\begingroup\$ Could you clarify what you mean? Possibly a diagram? I am certainly no expert, but I am unsure what you mean by twin wire neutral? Was it just two wires connected to the same nodes? \$\endgroup\$ – Matt Clark Dec 21 '15 at 5:13
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I think you are right, probably is to handle more current due to unbalance. Neutral cable's section for distribution transformer, should be the same as the phase conductor.

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