Need help with clean dB on retail unit

[Damian Petsas]

Hi all , We are carrying out a refit on a retail unit and the client wants us to provide a clean dB for the till power and the data cab. Can anyone clarify best practise for configuring this in the install .
The site currently has a 3 phase incomer with 60a fuses at the distributors side.
We are intending to install a schneider acti 9 TPN 8 way board with a 125A 4pole switch isolator to feed the general lighting and power. .
The intention was to go Into Henley blocks from the meter and then split to the TPN and off to a single phase board for the clean power . Is this correct ?

Many concerns are
1. If I install like this will the phases not be unbalanced ?
2 am I better off supplying the clean dB from a MCB in the TPN board?
3 can anyone give me general advice on best practice for balancing 3 phase DBS.

i know this is a large topic .

Any advice and help would be grateful . Many thanks in Advance

 

[Damian Petsas]

I've re read post 11 .dont mean to sound dumb but surely if iinstall with Helena blocks and feed both dbs . Each dB has a switch isolator therefore isolating the supply ? Or am I missing something here?

 

[Damian Petsas]

Right so feed from the meter end to a eton men TPN Isolator then off

 

[Pete999]

I've re read post 11 .dont mean to sound dumb but surely if iinstall with Helena blocks and feed both dbs . Each dB has a switch isolator therefore isolating the supply ? Or am I missing something here?

Whats Helena got to do with the job?

 

[Plonker 3]

Right so feed from the meter end to a eton men TPN Isolator then off

So you may aswell just feed it from your main DB, no point over complicating it.

 

[Damian Petsas]

Thanks for all your help guys I will be feeding from Main dB .thabks for your wise advise

 

[Engineer54]

Hi all , We are carrying out a refit on a retail unit and the client wants us to provide a clean dB for the till power and the data cab. Can anyone clarify best practise for configuring this in the install .
The site currently has a 3 phase incomer with 60a fuses at the distributors side.
We are intending to install a schneider acti 9 TPN 8 way board with a 125A 4pole switch isolator to feed the general lighting and power. .
The intention was to go Into Henley blocks from the meter and then split to the TPN and off to a single phase board for the clean power . Is this correct ?

Many concerns are
1. If I install like this will the phases not be unbalanced ?
2 am I better off supplying the clean dB from a MCB in the TPN board?
3 can anyone give me general advice on best practice for balancing 3 phase DBS.

i know this is a large topic . 

Any advice and help would be grateful . Many thanks in Advance

So what does the contract tender specifications call for, a so-called clean/dedicated DB or clean/dedicated MCB's, there is a mountain of difference in project cost here??

 

[Damian Petsas]

We have quoted for 2 Dbs a single phase 6way board and a 8 way TPN board my intention was to use the single phase board as the clean db

 

[Engineer54]

We have quoted for 2 Dbs a single phase 6way board and a 8 way TPN board my intention was to use the single phase board as the clean db

Then that's what you provide. If they want anything different, then that would be a bonafide reason for a cost variation to the contract.

 

[Had8Lives]

Does Helena come with the contract? lol

 

[Pete999]

Does Helena come with the contract? lol

No mate She's blocked get it? (Henly Block) I know go away, you sad git, me not you. lol

 

[Had8Lives]

Ha ha ha. Did she have a few screws loose then?