Installing downlights in bedroom.

[mihobb]

Can you help me? I am about to install 5 12V downlights. I am not sure wether I need to use trunking in the loft or it is enough that I use thermal resistant cable and put it on top of the insulation. What do you think might be the best solution?

 

[telectrix]

i would suggest using 230V LED lamps. that way you will have less current in the cables, no transformers , and less heat dissipation to worry about. if using halogens, make sure the is at least a 6" space clear of insulation around each fitting.

 

[Amp David]

Agree with the above. Can't see why anyone would want to fit halogens nowadays as LED lamps are very reasonably priced.

The last 4 downlight jobs i've done, the customer have been happy to go with LEDs.

 

[mihobb]

I am not using halogens. Just 50W spot lights. I am not sure what would be the best way to run the cables.

 

[vernam616]

Me personally i dont like LEDs, they dont give the same ambience as a 12v halogen, LEDs should be used in a torch only!

 

[vernam616]

I always put the pendant into a 4 way jb and loop a flex around the fitting with their own button JB and transformer

 

[telectrix]

I am not using halogens. Just 50W spot lights. I am not sure what would be the best way to run the cables.

so what type of spotlights. it's a no brainer to use 230v LEDs as the cost would be offset by not having to buy transformers.

 

[mihobb]

12V 50W. The question is about how ideally run the cables. Under or above loft insulation? To use trunking or thermal cable?

 

[telectrix]

if you cable under the insulation, as long as the derated CCC of the cable is > the load then no need for heat-resistant cable except for the flex to the fittings.

but i can't see why anyone would want to fit transformers which themselves are prone to breakdown, meltdown, fire risk, just 1 more source of failure,etc.

not to mention the fact that the current drawn at 12v is 20x that drawn at 240v.

 

[Octopus]

12v downlighters - YUK

Fit 240v GU10's then the customer can swap to LED's when they want.

 

[telectrix]

12v downlighters - YUK

Fit 240v GU10's then the customer can swap to LED's when they want.

i'd fit LEDs from the start. 5 LEds cost about £40-£50. save £30-£5 on transformer costs. ssssimmples.

 

[wattsup]

led
light expected dim?

 

[telectrix]

not dim if 4watts or more.

 

[Amp David]

Just put 6 4 watt LEDs in a bathroom today and there no way they can be called dim.

Its the guy who are stuck in their ways that are dim IMO!

 

[Amp David]

12V 50W. The question is about how ideally run the cables. Under or above loft insulation? To use trunking or thermal cable?

What type if not halogen?

Whats the MCB size and cable size.

Probably won't even matter about the effect of the itchy stuff