Running SWA co-ax and alarm cables in the 1 duct?

F

flowerman

Guest
Hi,we are redesigning our back garden very soon.This invloves making a larger pond.We will therefore need to redirect existing underground 10 square SWA cable along with 1 x co-ax cable,1 x Cat5E cable and 4 x 6 core alarm cables,all of which are also underground.
Having all the cables in the 1 x 50mm red ESB duct pipe would be ideal and mean less work and ducting to be relaid.

Im a bit concerned about the 10 square SWA cable possibly interfering with the alarm cable and cat5e......would it needlessly set off/trigger the garage alarm??
The Cat5e is there for an outdoor dome camera to keep an eye on the garage.....would the SWA interfere with the camera at all??
The co-ax is there for a TV point,but I dont bother watching TV when Im in the garage.

So my question is can the co ax,Cat5e,alarm cable and 10 square SWA all be fed into the 1 x 50mm underground ESB duct,or does the SWA need to be on its own in a seperate duct?




Thanks.
 
Not my area of expertise.
The swa doesn't need to be in the duct
if you ground the swa and the coax back to the board/earth then it should not be an issue.
ditto for alarm cable, use screened alarm cable and just ground the end at the control box, not the end at the sensors

Could you use coax for the video from the dome and just use the cat5 for the power/ptz controls.
I read that the main issues with Cat5 have to do with too much of the pairs being 'opened' up at the termination point.

Don't have a separate earthing point for the garage, it can lead to all sorts of issues for all the services, including what I think are called ground loops.
Hope this gives you some direction
ps Fluorescent lights are a main cause of issues
 
As Ircoha has said the SWA does not need to be in any sort of duct but should be terminated correctly at both ends using a suitable SWA Gland.

Also it is bad practice to have both low and high voltage cables in the same duct so if you do decide to duct the SWA then it should be in its own separate conduit.
 
Thanks to both of you for the advice.

I use baluns for the outdoor Cat5e-Dome Camera connection.1 pair for the video signal and 3 pairs to carry the cameras power.
I will take the advice and have the SWA in its own ducting (added protection from spade or shovels) and then I will have the co-ax,alarm cable and cat5e together in a 2nd ductung.
 
On a side note,any one know where in Dublin I can 2 x 6 meter lengths of the red or purple flexi ducting that the contractors use for cabling under the motorways?

I can get it in Wogans up in County Louth but dont want to have to travel that for to get it.

Thanks.
 
would it not be perhaps easier,simpler, to get some suitable lengths of 'hydro-dare' and run the cables through it. You are guaranteed it being watertight
If spades and shovels are the only risk as opposed to back hoes and front buckets, a duct for the 10 sq swa is overkill
 

Where the new trench will be dug will then become a 500mm tall raised dry stone wall and raised flowerbed with clump forming bamboos.The edge of our bigger new wildlife pond will come right to the edge of where this new trench will be dug.

I know that the SWA would be perfectly fine just layed in the trench and then filled over with 5-6 inches of sharp sand or grit and then some warning tape,but I think Id live and sleep easier knowing it was also in its own ducting.Also if I install the SWA in ducting then in the future (if needed) I can easily pull out or pull in more SWA with a fish rope.

Personally Id be happier with overkill than underkill if you get me.

But maybe Im putting too much thought process into this though??
 
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