MEP System Standard Colours for Layouts

Hi everyone,

I'm looking for guidance on the standard colours used for MEP systems, particularly for electrical services. CIBSE provides recommended colours for system drawings, but I’m unsure if these can also be applied to site services layouts. Should I follow a separate standard, such as NJUG guidelines, for site services?

I realise this is more related to CAD, but I’d appreciate any advice on the correct approach.

Thanks in advance!

Ishan