Surface mount T&E through plant room ?

[scanner]

Hello,

I've been asked to run in a new circuit for a dishwasher in a school staff room.

I've planned a 20amp / 2.5 T&E radial feeding a 13amp fused connection unit and fixed equipment connection point.

The planned cable run includes running across the ceiling of the plant room (2/3 meter run).

I'm concerned that using T&E in this way is not acceptable. Also, fixing the T&E to the ceiling is a concern as it is a concrete ceiling.

Can anyone please advise,

Thanks a lot,

Al

 

[Guest55]

fp200 cable , drilled and p clipped.

 

[Thefailsafe2012]

Tube it?

 

[Beavstro]

I would try to keep the proposed install in keeping with the rest of the electrics in the plant room ( within reason). If its done on cable tray and sy try to emulate it, sy clipped to the ceiling at least. Bare T&E on the ceiling would look bad, and lack any substantial mechanical protection, and of course look like a sore thumb compared to the rest of the Instal.
Any details on whats already there scanner?

 

[Redvanman]

Got to be in some sort of protection and good luck with clipping into concrete it would look like a dogs dinner

 

[thomas-1981]

Yea I would use conduit, T&E surface in a Plant Room seems a bit insufficient.

 

[scanner]

Thank you all for your replies.
It's funny what a stupid question it looks when the replies come in.
FP it is then.
Thanks, al

 

[dan86]

opting for FP then. I'd have just gone for t&e in conduit meself what are the rest of the electrics like?

 

[scanner]

Hi dan86,

There's already a couple of FP200 cables there so it'll look neat running alongside.

I was feeling uncomfortable about the lack of mechanical protection for the T&E. are there any hard and fast rules concerning protection in these environments or just common practise and common sense.

Cards on the table, I qualified a few years ago and have done very little spark work.

Still rather green.

Thanks,

Al

 

[Guest55]

t&e in pvc conduit would be totally inappropriate for the ceiling of a boiler / plant room.
heat would warp the conduit and t&e has absolutely no fire resistant properties unlike fp200.

 

[Guest55]

what mechanical protection do you need on a ceiling thats 3 mtrs up ?
how would it likely to get damaged by impact from normal use of the enviroment ?

none i'd say so pvc conduit adds nothing of use.

both my comments are just simple design considerations.

 

[telectrix]

who said anything about boilers? OP needs to consider any influences that may be detrimental and select his cable and installation method accordingly. FP or steel conduit, whichever is suitable.

 

[scanner]

The plant room was room temperature when I visited, but you're right, I must ask the care taker if this changes throughout the day.
FP would be easiest to install.
Thanks for steering me right.
Al

 

[Beavstro]

The ceiling isn't 3meters up, it's a 3m RUN. Being a plant room is it not likely things will get 'chucked in' ladders, garden equipment etc etc it is likely that mechanical damage could occur from this, plus as the run may incorporate wall runs and ceiling runs mechanical damage is more likely....
In my sense of the phrase mechanical damage, I mean any damage likely to occur to the cable not of an electric origin. Which includes environment (heat temp, humidity), fauna, flora, etc etc......

 

[ipf]

The ceiling isn't 3meters up, it's a 3m RUN. Being a plant room is it not likely things will get 'chucked in' ladders, garden equipment etc etc it is likely that mechanical damage could occur from this, plus as the run may incorporate wall runs and ceiling runs mechanical damage is more likely....
In my sense of the phrase mechanical damage, I mean any damage likely to occur to the cable not of an electric origin. Which includes environment (heat temp, humidity), fauna, flora, etc etc......

Pyro's the stuff......or throw a lead over.

 

[shanky887614]

who said anything about boilers? OP needs to consider any influences that may be detrimental and select his cable and installation method accordingly. FP or steel conduit, whichever is suitable.

personally i think galv conduit with singles would look the best in a plantroom

 

[7029 dave]

galvo tube or MI cable

 

[Engineer54]

If this cable run is just passing through the plant room (which is basically the school boiler room when all said and done) Then run whatever cable system you choose, (eg, FP 200, etc...) through a galv' metal conduit within that room.


Personally, i would probably choose a metal containment system or MICC installation for the circuit as a whole, but it seems these day's, both of these types of once mainstay electrical installations, are fast being cast aside in favour of easy fix wiring systems, like T&E, FP 200, and SY... MICC is already virtually classed as a ''specialist wiring system'', how long it's going to be, before the same can be said for metal containment systems is anybodies guess!! lol!!

 

[Outspoken]

OK, I think some common sense needs to be applied here.

Firstly, this is a plant room in a commercial or state owned building, therefore running mains voltage cable without mechanical protection is simply not acceptable, even if this is run on tray or basket it should be WHITE FP as a minimum.

If there are FP's already installed have you determined what they are for, it is likely at least one will be the fire protection system and as such you must not use FP200 or any other RED coloured cable and you must not run right beside it regardless.

If this is a 3m straight run I would advocate that surface mounted Galv Conduit be used as a "sleeve" to provide mechanical protection to whichever cable you choose to use, T&E utilising the conduit as a sleeve is acceptable. However being a local authority building (I guess as it's a school) I would suggest you use "Hospital" saddles and not spacer bar saddles because most authorities specify Hospital saddles as a matter of course.

 

[shanky887614]

OK, I think some common sense needs to be applied here.

Firstly, this is a plant room in a commercial or state owned building, therefore running mains voltage cable without mechanical protection is simply not acceptable, even if this is run on tray or basket it should be WHITE FP as a minimum.

If there are FP's already installed have you determined what they are for, it is likely at least one will be the fire protection system and as such you must not use FP200 or any other RED coloured cable and you must not run right beside it regardless.

If this is a 3m straight run I would advocate that surface mounted Galv Conduit be used as a "sleeve" to provide mechanical protection to whichever cable you choose to use, T&E utilising the conduit as a sleeve is acceptable. However being a local authority building (I guess as it's a school) I would suggest you use "Hospital" saddles and not spacer bar saddles because most authorities specify Hospital saddles as a matter of course.

can you add a pic of hospital sadles?

just use normal spacer bar sadles and worked in 5 hospitals and 1 was a new building and spacer bar were fine