Ok, I'm back with another question for your consideration. Quick recap, we are refurbishing a building for the Men's Shed charity. It's a single storey with huge attic. I have run the cabling for the water heaters (a ring, but temporarily spurred off a socket the electrician supplied to give us basic power, so I could test that the heaters work ok, and all is fine with that). That ring, and the cooker circuit (designed by Tel! Many thanks for that!) are run in clear air, clipped to the rafters, 100mm above finished insulation level.
The electrician is going to do all the final connections and check everything, but it is my task to install the rest of the cabling, so I now have to consider the lighting circuits. There will be 2, simply because we will have some light if one suffers a fault.
First of all, can anyone suggest suitable LED flat panels for an industrial type installation? I have worked out what our likely requirements are for the whole building, using standard LED 5w downlighters as a reference point, and we will need 40 of them.
However, all those holes in the ceiling (new plasterboard) make me wonder if there are good surface mounted chaps out there that are highly rated by you real electricians.
Secondly, I know that the LED downlighters don't have such awful heat emmission problems as the halogen ones, but there will be 300mm of insulation on top of the ceiling, and so I have to ask if shrouds are necessary for such recessed downlighters, and not for surface mounted panels.
As the total current draw is very low, I am not too concerned about the cabling as it will be in 1.5mm t&e which I would have thought would cope with the derating factors, but I must confess to being a bit hazy on this. I would normally have used 1mm, which would have been more than fine for the load (total run is 30m) but I assumed 1.5 would take up any slack?
I accept that there is always a risk that others in the future might install unsuitable lighting with higher loads etc but frankly I think this is very unlikely in this quasi-industrial setting where all the info will be logged and kept by the trustees, thus it is pretty doubtful that anyone would come
along and relace all the LEDs with halogens.
Sorry, I've gone on a bit...
Any suggestions/brickbats/recipies welcomed!
The electrician is going to do all the final connections and check everything, but it is my task to install the rest of the cabling, so I now have to consider the lighting circuits. There will be 2, simply because we will have some light if one suffers a fault.
First of all, can anyone suggest suitable LED flat panels for an industrial type installation? I have worked out what our likely requirements are for the whole building, using standard LED 5w downlighters as a reference point, and we will need 40 of them.
However, all those holes in the ceiling (new plasterboard) make me wonder if there are good surface mounted chaps out there that are highly rated by you real electricians.
Secondly, I know that the LED downlighters don't have such awful heat emmission problems as the halogen ones, but there will be 300mm of insulation on top of the ceiling, and so I have to ask if shrouds are necessary for such recessed downlighters, and not for surface mounted panels.
As the total current draw is very low, I am not too concerned about the cabling as it will be in 1.5mm t&e which I would have thought would cope with the derating factors, but I must confess to being a bit hazy on this. I would normally have used 1mm, which would have been more than fine for the load (total run is 30m) but I assumed 1.5 would take up any slack?
I accept that there is always a risk that others in the future might install unsuitable lighting with higher loads etc but frankly I think this is very unlikely in this quasi-industrial setting where all the info will be logged and kept by the trustees, thus it is pretty doubtful that anyone would come
along and relace all the LEDs with halogens.
Sorry, I've gone on a bit...
Any suggestions/brickbats/recipies welcomed!
