:iagree: bending conduit, tray and trunking is easy 3 phase.. power installs a domestic man could do. its when you get into industrial control, automation, PLC.
Even the basics of finding where the relvant D.B is can catch a lot of people out.
Yes it's in one of the 36 way 3ph boards somwewhere on a site, or is it part of the Essential distribution or even the U.P.S distribution.
It may be marked correcftly in the D.B, on the other hand maybe not.