When completing the Electrical Installation Certificate for a new build site that has multiple transformers supplying 400V and 690V, does each supply therefore require an individual certificate, bearing in mind that the 'Supply Parameters' will essentially be different for each one due to transformer differences etc.?

yes, i would. I sometimes work on treatemnt works with supplies from different transformers not in paralell, and i always fill out seperate EIC's, with a note that the building is fed from different sources.

Thanks Johnboy6083,

I agree that it certainly seems to be the case but seems odd to possibly end up with numerous certificates for what is essentially one installation?

is it one installation though?

Sorry, what I meant was that installing numerous transformers as part of a project on one site is one installation but electrically speaking, I guess they are, in effect, numerous installations.