Circuit Metering

[davesparks]

The other problem I have is the budget. It wont facilitate a £1,000 DB Board!

So what size board does your budget allow? If we round your design load per office down to 20A and say 14 offices/phase you have 20*14=280A per phase.
So you wont be using a standard 125A or 250A rated board will you?

 

[Leesparkykent]

back to the drawing board me thinks :icon12:

 

[LED Lighting]

So what size board does your budget allow? If we round your design load per office down to 20A and say 14 offices/phase you have 20*14=280A per phase.
So you wont be using a standard 125A or 250A rated board will you?

Theres 28 offices (current) but will probably reduce to 20 in total being supplied off this board.
Thats 140A per phase. I will go back to client tomorrow about this.

 

[davesparks]

So you started with 40 identical units, which became 2 different types of unit, which has now become 28 offices.

Give it another couple of hours and you'll get the whole lot on a 13A plug!

 

[LED Lighting]

So you started with 40 identical units, which became 2 different types of unit, which has now become 28 offices.

Give it another couple of hours and you'll get the whole lot on a 13A plug!

No 2 DBs are being installed in total.
28 on the 1st floor and 12 on the ground floor

as some offices are being joined into double size offices it will be 20 on the 1st floor and 12 on the ground floor.

Nothing was said about 40 identical offices. I just said 40 offices.

 

[bigspark17]

BS88 fuses or correctly set MCCBs are what you need, bs1361 has been replaced/merged into bs88 now

When did this happen.? That why theres no 1361 time charecteristics in regs now

 

[Lucien Nunes]

theres 40 offices, so needs to be 16 or 18 way TP&N

Theres 28 offices (current) but will probably reduce to 20 in total being supplied off this board

I don't have my copy of the BYB to hand but I think this is technically called moving the goalposts.

 

[Leesparkykent]

When did this happen.? That why theres no 1361 time charecteristics in regs now

2013 I believe

 

[LankyWill]

Edit: link didn't work

might be better to use something like these for the distribution circuits.

Never seen these Lee, what sort of ocpd are they?

 

[Leesparkykent]

Never seen these Lee, what sort of ocpd are they?

They are BS88 HRC fuse carriers. My browser wont let me post links for some reason but type hager LS201 in to google.