Mixing Cable Sizes

[Evans Electric]

Ive just done 19 Aurora downlighters with 1.5mm cable and it was tight getting the two cables into each chocblock. Do you guys use them Ashley maintenance free junction boxes for downlighters so only 1 cable into the actual downlight itself.? Just looking to make it easier next time lol

Cheers

I use JCC F/R , 240V downlights and wire in 1.00 mm ,connectors and clamp will take 2 X 1.00mm nicely.

 

[Theorysparky]

Ive just done 19 Aurora downlighters with 1.5mm cable and it was tight getting the two cables into each chocblock. Do you guys use them Ashley maintenance free junction boxes for downlighters so only 1 cable into the actual downlight itself.? Just looking to make it easier next time lol

Cheers

i know what i would do......

have you seen my pics ?????

 

[m4tty]

i know what i would do......have you seen my pics ?????

I have mate but would like a refresher if anyones got the link please

Cheers:Blushing

 

[Theorysparky]

I have mate but would like a refresher if anyones got the link pleaseCheers:Blushing

http://www.talk.electricianforum.co.uk/showthread.php?t=8199

if i need to do alot of downlighters i use a 4inch adaptable box and break out 'spider method'

 

[alchemist]

Coincidentally, I have just read this in the Elesca guide to common problems with downlighters...

A problem commonly encountered with recessed lighting is the suitability of the

wiring utilised

 

[Sidewinder]

Mike,

According to Mr Ohm, & my calculator 50W @ 12V = 4.16r amps

The cable between the lamp & the transformer would be the cable supplying the lamp would it not?

The cable supplying the transformer would draw a lot less current depending on the rating losses etc.

 

[Larnacaman]

That's right alchemist, only between the tranny and the load/light....

My swimming pool lights are 12v/300 watts a piece, and i have 2 of them, fed from individual trannies in the pool control panel. The mind boggles at the current they draw from those rather large trannies 25A each!! There wired in 6mm cable due to length of runs and how easy it is to lose a good part of that 12volts at that load ...haha!!!

 

[ProDave]

‘The minimum cross-sectional area of the extra-low voltage conductors shall be:

(i) 1.5mm sq copper, but in the case of flexible cables with a maximum length

of 3m a cross sectional area of 1 mm sq copper may be used.

(ii) 4mm sq copper in the case of suspended flexible cables or insulated

conductors for mechanical reasons.

(iii) 4mm sq copper in the case of composite cables consisting of braided tinned

copper outer sheath, having a material of high tensile strength inner core.’

That just highlights how rubbish most downlighters are.

When was the last time you saw a 12V downlighter with terminals that would accommodate two 4mm sq cables in each terminal?

I didn't think so.

 

[ianmacd]

That just highlights how rubbish most downlighters are.When was the last time you saw a 12V downlighter with terminals that would accommodate two 4mm sq cables in each terminal?

I didn't think so.

Eh? Only needs to be 1.5mm

 

[batty]

So would you 1mm men use it on new builds with insulation?

 

[Theorysparky]

yep

derate by 50% gives you 6 amps to play with

i have just done a 2 bed detached and given it 3 lighting ccts

up lights 600w max no diversity

lounge o/s lights util dining room 600w max no diversity

Kitchen, toilet, under cabinet lights 600w max no diversity

just need to plan it properly