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yeah just short each tail one at a time to earth and carry out a continuity test between the L1-E,L2-E,L3-E, N-E at the DB? to identify each one?

The meter is isolated, I am not planning on working on this meter was just a general question. The 4 tails are ran to a 3 phase DB located in another room.

Hi, I have a quick question I have come across a 3 phase meter with all black tails on the load side. These are unmarked and have been disconnected, How do I test to identify each cable? Thanks :)