Nt1310 Unit 5

Question 1(a)

Power
A 100a Distribution Board will be used to power Block L. A ring circuit will provide power to the substation room and Generator/switch room (labelled Sockets, Generator/Switchroom). It will be protected by a 32A BS EN 60898 type C RCBO. The RCBO type C is used as equipment could either be plugged in from outside or attached to an inductive load. Another ring circuit will provide power for the workshop and restroom (labelled Sockets, Workshop/Restroom), this will also be protected by a 32A BS EN 60898 type c RCBO as again, equipment could be plugged in from outside or attached to an inductive load, as well as equipment being used within the restroom. The Electric Roller Shutter Door (labelled Motor Door) will be wired
This is to create the board schedule for the lighting and power distribution board. The board’s maximum demand is 100A so the diversified current cannot exceed this. A board schedule can be made showing all circuits protective device, design & diversified current, and the total diversified current.

CircuitNo. | CircuitDescription | No. Of Points | Protective Device Rating (A) | Protective Device Type | Design Current(A) | Diversity Factor | Diversified Current(A) | 1 | Ring Final(workshop, restroom) | 10 | 32 | C | 32 | 1 | 32 | 2 | Ring Final(substation/generator/switchroom) | 4 | 32 | C | 32 | 0.5 | 16 | 3 | MotorDoor | 1 | 16 | C | 13.04 | 1 | 13.04 | 4 | Lighting - Outside | 5 | 10 | C | 5.87 | 0.9 | 5.28 | 5 | Lighting - Switchroom | 8 | 10 | B | 8.77 | 0.9 | 7.89 | 6 | Lighting - Switchroom | 6 | 10 | B | 6.57 | 0.9 | 5.91 | 7 | Lighting - Substation | 5 | 6 | B | 5.48 | 0.9 | 4.93