I'm not suggesting you do this, but in my first COB grew, we had about 8 x 240W drivers on each wall plug, (we get 220Vx16A from the wall).This would help you with AC mains current surge problems with large scale COB lighting systems
Not recommended in America on regular house power of 120V @15-20A. If he has access to 240V in his house then it becomes much easier to do. I've run 240V@30A 'dryer circuits', which would be much more than enough.I'm not suggesting you do this, but in my first COB grew, we had about 8 x 240W drivers on each wall plug, (we get 220Vx16A from the wall).