Small power

[Lc1]

I have been given the preliminary design of the small power system for an industrial complex. The design states that a switched fused connection unit should be on its own circuit , would this not normally be part of the ring main? Has anybody seen this before ?

 

[Rocboni]

Depends on what load is on the switch fuse, it's a good idea to have them on here own to prevent loading up the ring, especially in a industrial complex where the ring may be getting used extensively for power tools ect. There are many reasons to put the switch fuse in its own circuit.

 

[snowhead]

If that's what the designer/ customer wants, that's what you need to quote for.

The Commercial buildings I work on have many dedicate single SFU circuits.
It's not unusual at all.

 

[westward10]

Can be part of ring or on their own radial, doesn't matter.