Hair salon project

[infinity]

Hi

Been asked to quote for a hair salon, brand new fit in an empty building, was just wondering as the customer intends on dry lining all walls and ceilings i was going to run basket above ceiling with T&E cabling as only 11Mx 9M, i was gong to drop cables with pvc conduit, into drylining boxes, this would mean RCBO's on most circuits, as switch drops would mean rcd protection as would sockets etc.,

I was only wondering if all the rcd protection could end up being troublesome? as dryers could trip them out etc, also i was going to put 2-3 sockets max on a ring supplying dryers due to the current usage of them.

thanks

 

[johnboy6083]

If you know the distance he is fitting the board from the wall, you could use normal boxes, and steel tube for your drops. Then omit RCD protection. For the hand held driers, then RCBOs are the way forward, as they'll be near sinks ect. That's my take on it

 

[sedgy34]

ditch the basket and use the cost of that on rcbo,s going to be alot easier also for testing and convenience, i would do 4mm radials for the power

 

[Adam W]

Sounds fine to me, although I expect one of the resident dinosaurs will be on in a second to tell you the only acceptable way is to wire it in singles in steel trunking and conduit "because that is a proper job".
Most hairdryers are class 2 these days, which should reduce 'nuisance tripping'.

 

[Engineer54]

Sounds fine to me, although I expect one of the resident dinosaurs will be on in a second to tell you the only acceptable way is to wire it in singles in steel trunking and conduit "because that is a proper job".
Most hairdryers are class 2 these days, which should reduce 'nuisance tripping'.

Yep!! God forbid encouraging anyone on doing a proper installation in this day and age!! lol!!!

 

[BlueToBits]

The last hair salon I was called out to had four 8.5kW shower units fed from a single phase 60A supply.

 

[infinity]

Only 3 16A supplies for the water system there.
Would be nice to do it all in metal conduit but thats probably the fastest way to price myself out the job! already over 3K just on the lighting alone!

Basket with T&E and Rcbo's best way forward as i see it then

 

[telectrix]

you could do it all in MICC. :waving:

 

[jumpin jax]

Why not do a perimeter in pvc trunking above ceiling height and then do your drops, all in singles then.

 

[Adam W]

Why not do a perimeter in pvc trunking above ceiling height and then do your drops, all in singles then.

How would you wire the ceiling lights?

 

[jumpin jax]

I see your point but it depends on ceiling, i assume it will be suspended with 600s in it, then you could use klik multi sockets

 

[sedgy34]

I see your point but it depends on ceiling, i assume it will be suspended with 600s in it, then you could use klik multi sockets

10 out of 10 for effort depends on the price hes got in for it

 

[infinity]

I have priced to run basket round perimeter with pvc conduit runining into middle of ceiling area with Klix roses for the lights to click into, that way i can test all circuits before the ceiling even goes up done before and worked a treat, easy to add a few more in ceiling too for future use or when client decides he wants an extra light! just flex it up and click it in!

 

[Spudnik]

Do lighting circuits need RCD protection if there is a 'skilled operative' working there?

Even if so, i think i would use SC so that there are less RCD's present.

 

[Adam W]

Given the proximity of electrical equipment such as hairdryers to plumbing equipment such as sinks and shower heads I think the installation would benefit from RCD protection.
I wouldn't consider a hairdressers to be under the supervision of a (electrically) skilled person; I would say the risk varies across the board - a one man (or woman) operation where the proprietor might be keen to save money and add their own personal touch by putting up some pictures or shelves would pose a higher risk than somewhere like Toni & Guy where the salon might have to conform to a strict company standard and all maintenance is done by a centrally sourced contractor.

 

[Guest55]

Do lighting circuits need RCD protection if there is a 'skilled operative' working there?

If the switch drops are surface wired in say pvc conduit then lighting wont need rcd protection anyway.

 

[Engineer54]

you could do it all in MICC. :waving:

Ooooooo that's now a ''Specialist'' installation method!!!

I wonder how long it'll be before metal containment installation systems will come into the realms of ''Specialist installation''!!!!! Not too long me thinks!! lol!!

 

[Knobhead]

Just so we know where we’re heading, is this what is best or what is cheapest?

The cheap option will probably come out and bite you later.

But from your posts it looks like you’ve decided what you’re going to do anyway.

 

[Adam W]

We all know that cheapest isn't always best, but cost is usually a factor.
In this situation what is the worst that can happen from installing basket and pvc conduit instead of steel conduit?

Perhaps the hairdressers enjoy seeing if they can throw their scissors into the ceiling tiles so hard that they hold there and there could maybe be the possibility of going right through the tile with such force that they go straight up through a hole in the basket (which will be around the perimeter of the room) and penetrate the cable sheath and insulation, then they could stand on some aluminium steps to go to pull the scissors out of the cable and get a shock because you had decreed that they were skilled and instructed people so the circuit didn't need rcd protection.

Personally I think this seems a bit far fetched - I reckon basket and pvc conduit will be just fine.

 

[trev]

Ooooooo that's now a ''Specialist'' installation method!!!

I wonder how long it'll be before metal containment installation systems will come into the realms of ''Specialist installation''!!!!! Not too long me thinks!! lol!!

For any "young uns", time was when a spark had to be able to use all types of cable, and containment no matter what it was.
We used to have to be able to test our own work too, no relying on gadgies who had done 2391 because we had been taught how to do it it was expected of us