One of the most amazing things about three phase electricity is that in a perfectly balanced system a neutral wire isn't needed. In this video, Joe Robinson shows how the neutral current sums to zero when an equal load is connected to each phase.

This helps to explain why the neutral conductor in a three phase cable is the same size as the other phases and why some industrial sockets don't have a neutral connection.

This electricians Q&A follows from our review of the Variabox, from CEENORM, which is a flexible power distribution system for industrial electrical installations.

   • This job could have been so easy  If...  

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00:00 Industrial Electrical Installations
00:42 Does current flow in the neutral conductor yes & no?
00:50 Neutral current in a ingle phase circuit
02:00 Neutral currents in a Three Phase circuit
04:09 Lower than expected current?
05:08 No neutral current?
05:48 Why does this happen?
06:30 Electrical installations with no neutral
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