down lighters

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dougal

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i have been asked to install 6 50w down lighters

they are mains operated giving 1.31A load

I have some .75mm flex to wire up the downlighers

from the wiring that is already there (1.5mm)

I know that the flex is rated at 6A and the mcb is 6A

to me this sounds OK but what is your opinion?

 
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i have been asked to install 6 50w down lightersthey are mains operated giving 1.31A load

I have some .75mm flex to wire up the downlighers

from the wiring that is already there (1.5mm)

I know that the flex is rated at 6A and the mcb is 6A

to me this sounds OK but what is your opinion?
As downlighters a 'fixed' thing shouldn't we use cable rather than flex?

 

dougal

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termination piont is small and as far as I am aware the regs allow you to use flex in fixed wiring ( I have the flex going spare)

I complys with regs but only just as the flex is of equal rating to the mcb

 
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If only one length of flex per light...

will be no different electrical loading wise than a ceiling rose & pendant..

with a bit of flex between them..

i.e. one length of flex only taking 1 x 50w bulb!

connected back to a 1.0mm or 1.5mm T&E!

I would just be careful that the routing of the flex doesn't leave it susceptible to heat damage from any other lights;)

 

daryl631

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I use small junction box at each downlight run cable into box then small length of flex into downlight looks ok and easy to terminate;)

 

dougal

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I have nowdone the job now thank you for the advice

I used 1.5 t&e through out

Termination was tight but is ok

 
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For future reference:

If you are wiring low voltage downlights..............

Be aware that the wiring from secondary of transx to lamp is ACTUALLY drawing 50/12 = 4.1A!! If you use 1 150W tranny for 3 lamps, and daisy-chained (not recommended), you`d have almost 13A on the first section of cable.

This in turns affects volt drop, more than you`d normally think.

esp. bearing in mind that 12V lamps don`t like having their voltage messed with unduly.

I`ve seen a lot of people use 1.5mm from JB / rose to the tranny. then thin .75 flex to the lamps. When you tell them they`d be better off the other way round, they look at you like you`re an idiot! "It`s only 12 volts" is the usual comment.

 

dougal

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For future reference:If you are wiring low voltage downlights..............

Be aware that the wiring from secondary of transx to lamp is ACTUALLY drawing 50/12 = 4.1A!! If you use 1 150W tranny for 3 lamps, and daisy-chained (not recommended), you`d have almost 13A on the first section of cable.

This in turns affects volt drop, more than you`d normally think.

esp. bearing in mind that 12V lamps don`t like having their voltage messed with unduly.

I`ve seen a lot of people use 1.5mm from JB / rose to the tranny. then thin .75 flex to the lamps. When you tell them they`d be better off the other way round, they look at you like you`re an idiot! "It`s only 12 volts" is the usual comment.
the lamp are on 230v mains and dont have a tranny

thanks

 
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