Hi,

Next month Im planning (in conjunction with my patio work) to fit
recessed LED lights into the actual patio slabs.


>From previous posts Ive got the wiring worked out but now I need to

think about what happens to the electrical cable that feeds the lights
once it comes out of the house and needs to go underground.

The fittings that I plan to use allow 3 fittings to be wired in series.
Im using 6 fittings so I need two feeds. My plan was to run 2 x 1.5mm
SWA out of a hole in the wall of the house and then down the wall in
some conduit.

Speaking to a mate of mine reservations were raised about whether this
would be possible. I gather that SWA isnt very flexible and I may have
trouble bending it around in the condiut box the required 90 degrees to
run down the wall.

He also mentioned glands. I plan to fit a conduit box to the exterior
wall with a hole in the back for the cable to run into the house. So
basically, one conduit box on the wall with approx. 1 meter of conduit
going down the wall into the ground. Where would I need to fit glands?

Any other thoughts on if Ive got the right idea here?

Cheers,

CM.

On 17 Sep 2005 07:03:08 -0700, "Charles Middleton"
 scrawled:


>From previous posts Ive got the wiring worked out but now I need to
>think about what happens to the electrical cable that feeds the lights
>once it comes out of the house and needs to go underground.
>
>The fittings that I plan to use allow 3 fittings to be wired in series.
>Im using 6 fittings so I need two feeds. My plan was to run 2 x 1.5mm
>SWA out of a hole in the wall of the house and then down the wall in
>some conduit.
>

No need for the conduit, just run thew SWA down the wall or run
singles or other cables in conduit, no need to go OTT.


>Speaking to a mate of mine reservations were raised about whether this
>would be possible. I gather that SWA isnt very flexible and I may have
>trouble bending it around in the condiut box the required 90 degrees to
>run down the wall.
>

Quite right, you've not got a prayer of getting SWA through conduit
and around corners.


>He also mentioned glands. I plan to fit a conduit box to the exterior
>wall with a hole in the back for the cable to run into the house. So
>basically, one conduit box on the wall with approx. 1 meter of conduit
>going down the wall into the ground. Where would I need to fit glands?
>
>

On the ends of the cable. Run the cable up the exterior wall,
terminate into a galv end box and run from the back of their into the
house.


>Any other thoughts on if Ive got the right idea here?
>

Well, I've seen worse ideas. I take it these lights are low voltage
then? If the transformer's going in the house and only the SELV supply
is going outside then I'd not use SWA, OTT again.
-- 
Stuart @ SJW Electrical

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Lurch wrote:

<snip>


> Well, I've seen worse ideas. I take it these lights are low voltage
> then? If the transformer's going in the house and only the SELV supply
> is going outside then I'd not use SWA, OTT again.


Thats the question - there are two options on the lights: Low Voltage
with a transformer where I can run them all in series and as you say
put the transformer in the house. The option is mains powered, three in
series at a time and costly messing around with SWA.

I think for the convenience and what you have said above its a
transformer in the house job and then presume standard 1.5mm twin (or
twin and earth). Ill probably use condiut down the wall to keep it
tidy.

Cheers,

CM.

On 18 Sep 2005 11:20:57 -0700, "Charles Middleton"
 scrawled:


>
>Lurch wrote:
>
><snip>
>
>> Well, I've seen worse ideas. I take it these lights are low voltage
>> then? If the transformer's going in the house and only the SELV supply
>> is going outside then I'd not use SWA, OTT again.
>
>Thats the question - there are two options on the lights: Low Voltage
>with a transformer where I can run them all in series and as you say
>put the transformer in the house. The option is mains powered, three in
>series at a time and costly messing around with SWA.
>

This series thing is worrying me. What exactly is wired in series?


>I think for the convenience and what you have said above its a
>transformer in the house job and then presume standard 1.5mm twin (or
>twin and earth). Ill probably use condiut down the wall to keep it
>tidy.
>

Probably easiest, just use PVC rigid and\or flexible tube to run the
LV cables in. Try and keep the runs short and you might want to use a
slightly bigge rcable for volt drop on the SELV side, something like
4mm.
-- 
Stuart @ SJW Electrical

Please Reply to group

Lurch wrote:

<snip>


> This series thing is worrying me. What exactly is wired in series?


Im possibly using the wrong terminology. What I mean is the cable loops
in and out of each fitting. So you connect from transformer to fitting
1, 1 to 2, 2 to 3 and so on. Take a look at:
http://www.tlc-direct.co.uk/Technical/DataSheets/Firstlight/FL1806.pdf


> Probably easiest, just use PVC rigid and\or flexible tube to run the
> LV cables in. Try and keep the runs short and you might want to use a
> slightly bigge rcable for volt drop on the SELV side, something like
> 4mm.


Will bare that in mind cheers.

CM.

On 18 Sep 2005 13:56:44 -0700, "Charles Middleton"
 scrawled:


>> This series thing is worrying me. What exactly is wired in series?
>
>Im possibly using the wrong terminology. What I mean is the cable loops
>in and out of each fitting. So you connect from transformer to fitting
>1, 1 to 2, 2 to 3 and so on. Take a look at:
>http://www.tlc-direct.co.uk/Technical/DataSheets/Firstlight/FL1806.pdf
>

Parallel then. ;)
-- 
Stuart @ SJW Electrical

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