Commercial rewire options

[i=p/u]

Have a cafe job to price this week, il get look tomorrow maybe.. 2000 sq ft..

I don't think he is going to go with steel pipe so nearly all my circuits is going to need rcd protection . I know there's roughly going to be 5-6 3 phase machines , and maybe 16 single phase circuits

im going to install 2x 8 way 3phase boards side by side , one board for 3 phase equipment with and up front rcd . The second board = 24 ways using Rcbos for single phase final circuits .

Does this sound the way Togo , il listen to how you would do it. Thx

big length of trunking straight down one side

 

[Guest55]

one board for 3 phase equipment with and up front rcd

i would avoid that at all costs , design out the need for rcds on everything but sockets would be my first consideration.

 

[i=p/u]

Turbo ovens and all that which require d breakers ... Normally 32A 4mm coffee machines I'd say high inrush... His other cafe's have no rcd a at all bar sockets...

 

[i=p/u]

Well that's what I'm thinking about , 3 ph stuff

 

[i=p/u]

Well maybe could Steel pipe 3 phase equipment ..

 

[Guest55]

for the 3 phase equipment i'd be looking at 5 core pvc cable either clipped direct or on steel basket in the ceiling space with surface fixed pvc conduit drops to isolator switch points , and IP rated units near wash stations / food prep areas.

 

[snowhead]

Don't upfront RCD, catering equipment is prone to earth faults, quite often due to enthusiastic cleaning
Your suggestion means 1 out, ALL out.

 

[i=p/u]

Yeah didn't sound right.. This is empty shell.. So il think he want no pipe on walls .. All concealed...

 

[Guest55]

.. All concealed...

fair play , you'll need steel pipe then , but still avoid rcd for kitchen equipment.

 

[i=p/u]

The amount of gadgets threse places gather up I'm doin ,4mm radials 4 double sockets max in serving counter / kitchen area .... Per circuit...

what size of 3 ph boards can you get. Many ways . Might only need one board now and a 6 way board around entrance for future works...

 

[Guest55]

big cafe then , most i see run off a 8 way cu lol.

 

[i=p/u]

As I say early days , but all will be revealed tomorrow i think. Cameras alarm and fire alarm I'd assume aswell, which I'm told twin flex are good panels.

 

[Guest55]

twinflex is good stuff , not the cheapest but easy to fit & wire.

 

[Brightspark2]

what size of 3 ph boards can you get.

4,6,8,12.....24....3 phase ways...all sorts of shapes and sizes...

 

[somersetsparks]

how about some flush pyro, less chasing!

 

[Guest55]

how about some flush pyro, less chasing!

have you any idea how much 4 core 4mm pyro costs ? lol
its a cafe , not ICI.
;-)

 

[i=p/u]

How about PVC trunking on striped wall paper...

 

[High Tower]

Put all of the 3phase on commandos close to the ceiling run on SWA, You should only need one bigger board, keep the costs down, just RCBO the Socket outlets, run the cables in 25mm conduit low level and stab up behind the counters, units etc.

Depending on the ceiling type and installation method you may get away with no RCBO's on the lighting.

 

[somersetsparks]

have you any idea how much 4 core 4mm pyro costs ? lol
its a cafe , not ICI.
;-)

was meant tongue in cheek lol.
We used it in a school kitchen for the same reason as the OP needs to, was the only way short of chasing into pre-fab concrete panels

 

[Engineer54]

was meant tongue in cheek lol.
We used it in a school kitchen for the same reason as the OP needs to, was the only way short of chasing into pre-fab concrete panels

Most prefabricated concrete panels are normally ''pre-stressed'' and can't be chased, even if you wanted too.... lol!!

 

[i=p/u]

High tower I prefer to use the isolator sockets , I can't picture you view with commando sockets at ceiling.. Are you saying mount a commando at top then like extension lead to isolator socket???? Which then can Be moved at any time only leaving commando at ceiling height,,


it could work but again depends on his finished look

 

[i=p/u]

Say 6mm 5 c high tuff , would that fit in 25mm pipe??

 

[GLENNSPARK]

big cafe then , most i see run off a 8 way cu lol.

give up Biff
everyone knows its 4 way BS3036 wylex`s...

 

[i=p/u]

Update , if he metal studs the whole building , that will mean rcd protection through out..????

 

[somersetsparks]

Update , if he metal studs the whole building , that will mean rcd protection through out..????

Or SWA, pyro or steel conduit would still be fine