Hi newbie here... Just a quick one, have a 600mm void above a suspended celing, with 13 hf lights (600x1200) cable selection either lsf? Or hr?

why what temperature do you expect ceiling void to get to?

Im trying to think of all the office ceiling tiles i lifted over the yearsand not seen much lsf wiring.

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Dougie
Power Plus Electrical.co.uk

My mission is to live as long as possible......so far so good!

What's wrong with t/e then?

What's the situation? I'd only think about LSF if there would be a particular problem with smoke if there was a fire - e.g. escape route in a public building or somewhere like a data centre or museum where the cost of cleaning up smoke damage would be excessive.

- Andy.

Ideally a nice neat instalation with plug in roses or banks, flexes to final light fittings. Realistically, lift tile, stick head through, coil of t+e, best boomerang throw! New fangled cable rods probably have a place these days, but a well aimed boomerang throw is satisfying, if rough as a badgers behind!

If you can get in before the ceiling grid you have a chance at a neat instalation.

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Regard
Richard (Dick)

www.rllewellyn.co.uk

Council have demeaned fire alarm system and in there words some sort of heat resistance cable, flats above the shop, it's a full re-wire.. The condition at the miniute is terrible

Full access above celing to :-)

What is the intermediate floor construction ?

Regards

OMS

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Failure is always an option

It's concrete, also there is only one fire escape

Sounds like council don't have a clue (wouldn't be the first time).

Given the relative fire loads presented by the electrical installation and everything else in a building, then providing a fire resistant cable is pretty pointless. HR cable would be even more pointless.

I'd go back and challenge them as to what they want in reality now they've had a bit of time to think about it. Whilst your at it ask them what the cause and effect and category of fire alarm system they require - if you are designing it, you may be in a world of s!!t if you get it wrong

Regards

OMS

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Failure is always an option

They have been quite precise on the category of system they want.. Luckily.

OK - that's a start - get the fire resistance of the general cabling clarified - it could save you (and/or the client) a few bob

Regards

OMS

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Failure is always an option

I'm gunna get on it tomorrow, thanks oms

Sounds like a candidate for a nice little 3" x 3" trunking run and some plastic conduit and klix roses to me

Failing that - a few ugly strap loops and rough it in with T&E

OMS

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Failure is always an option

Gt my klix.. Just spoke to customer they want lsf, but moaned when the price changed :-/.. Was considering some sort of tray but I've price for band now..