Yes, the IEE does always seem to have been rather obsessive about this compared to most other places.

You could group outlets around the trunking to an extent, e.g. ten on red phase, next ten on yellow, next ten on blue etc. Then you'd just need a warning label between groups where adjacent outlets are on different phases:

[Linked Image from tlc-direct.co.uk]

[This message has been edited by pauluk (edited 01-20-2004).]