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LED Lighting

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Hi All

I have been asked to install a New DB to serve 40 offices, with the facility to meter each office individually.
I was thinking of installing a 18way TP&N DB, running 10mm to each office where a smaller SP CU is installed branching off to 3 circuits. Lights, Sockets and electric heater. A Din Rail Energy Monitor would be installed in this CU.

Whole install is in Dado and plastic trunking on the surface so RCD is in the office CU and not the 3P&N DB.


Any thoughts on this or any other way of doing it.
 
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What type of protection were you thinking of using for the sub-mains?
You can get SP boards with meter packs these days which also have communications options so these meters could all be remotely monitored
 
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davesparks said:
What type of protection were you thinking of using for the sub-mains?
You can get SP boards with meter packs these days which also have communications options so these meters could all be remotely monitored
Click to expand...


Any links would be greatly appreciated.

I was thinking just MCB protection in DB and RCD in Sub SP Board.
Thinking no requirement for RCD between DB and SP Board as the supply is in trunking
 
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LED Lighting said:
Any links would be greatly appreciated.

I was thinking just MCB protection in DB and RCD in Sub SP Board.
Thinking no requirement for RCD between DB and SP Board as the supply is in trunking
Click to expand...
Any non-domestic board should have various meter pack options these days

So you arent interested in providing any discrimination between ocpds then?
 
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LED Lighting said:
3KW approx per room.
Total of 30-40 offices on this DB.

Offices will have 5 double sockets (PC use), 1 x 1KW Heater and LED Lighting
Click to expand...

Edit: link didn't work

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

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Leesparkykent said:
http://www.hager.co.uk/product-catalogue/energy-distribution/protection-devices/fuse-carriers/hrc-fuse-carriers-bs88/ls201/47120.htm

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


Whats the benefit of using these?
I was thinking MCBs are readily available and anything else the client wants to add later on they can.
 
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davesparks said:
Any non-domestic board should have various meter pack options these days

So you arent interested in providing any discrimination between ocpds then?
Click to expand...

What do you mean about discrimination of over current protective devices?
There will be a 50A MCB in the DB, and in the CU there will be 32A - Sockets, 16A - Heater and 6A Lighting.
They wont even get anywhere near this.

The offices are single occupancy offices so they should not even use 20A day to day.
 
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LED Lighting said:
Whats the benefit of using these?
I was thinking MCBs are readily available and anything else the client wants to add later on they can.
Click to expand...

would provide better discrimination. you will struggle to achieve discrimination between MCB's. For example a fault on the lighting circuit in the office could just as easily trip the MCB feeding the distribution circuit taking out the computers.
 
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LED Lighting

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Circuit Metering
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