Electrical demand question?

[Welderpaul]

I have a power requirement of 72KW 3P and neutral for a new laser install.

How do i find out what the incoming supply is rated for, essentially so i know it will be sufficient. We currently have two incoming supplies, with no reason why the incoming cable and fuses would be different between the two. I can look at the fuse ratings but would guess 80amp.

Guidance much appreciated

 

[addjunkie]

Ring the DNO they will tell you

 

[Martin-Sy]

72KW 3P and neutral for a new laser install.

That's over 100A per phase assuming balanced and unity power factor which it won't be.