Partial Power Outage in J Block!

For some reason, the 3rd and 4th floor of J Block have completely lost power. This could be caused by a number of things and I am currently on site investigating the problem. The issue seems to be coming from a Distribution Cupboard on the 3rd floor, outside Sick Bay and seems to be connected with the feeder cable between the 2nd and 3rd floor. However, I cannot reset the breaker on the distribution board, meaning that there is a problem somewhere.

A quick diagram of the Electrical Distribution from the 2nd 3rd and 4th floor and from the rooftop Plant Rooms

I’ve got Electricians here trying to sort the problem out, however, I have had to take battery powered Halogen Work Lights up to Sick Bay, which is our School’s Medical Centre, Sick Bay runs 24\7 so we need to keep the lights on for staff to work. They are doing well up in Sick Bay, as most medical equipment runs on batteries and for the couple of kids up there who rely on Medical Oxygen, are using cylinders instead of the mains oxygen, which is connected pipework, that connects to a manifold and then several cylinders of oxygen. As the 4th floor contains offices, the loss of power will not be too much of a concern tonight.

Update: The Electricians have said the fault is caused by a damaged cable, which they are going to replace. However, they will need to work on a “live system”, as we cannot really switch off the entire supply to the 2nd floor. This means that the electricians will have to take extra care, while replacing the wiring in the cabinet, Hopefully, in 45 minutes, the power will be restored and I can go back home. I was in the bath, when I got the call and had to quickly dry off, get dressed and drive back to work, to deal with the incident.