Data down SY cable thoughts

[lews123]

Has anyone used SY cable to send data down? Thinking about potentially running an intercom from gate at top of driveway down to house via SY. Thoughts?

 

[The Ghost]

Well you have to have the twisted pairs to cut down SNR and SY outside mmmm dont think so.

 

[cliffed]

Maybe not,data relies on different ratios to each cable ,ideally twisted pairs,cat 5 etc.
Wouldn't work,without problems.

 

[jackhammerJIM]

SY is not made to be buried . Use armoured CAT 5

 

[ruston]

It is not suitable for outside use full stop.

 

[westward10]

Not suitable for any use.

 

[cliffed]

Not suitable for any use.

Wouldnt you use it for control cabling,motors etc,obviously loads use sy for roller doors,air conditioning.
Certainly not for outdoor,buried installs.

 

[7029 dave]

Not suitable for any use.

I like the shine on it, however not for external use.

 

[cliffed]

I like the shine on it, however not for external use.

Ha ha,Brillo pad protection

 

[Ian1981]

There's a page in the on site guide warning about using SY,YY and CY for fixed wiring as it's not made to a British recognised standard and warns about installing it in place if more recognisable BASEC cables.
That said if your not using it for 300/400 volt applications, it may not apply.

 

[westward10]

I CY I can't use SY but YY do people use it.

 

[Ian1981]

I CY I can't use SY but YY do people use it.

YYY Delilah

 

[The Ghost]

icur2ys4me

 

[lews123]

Regarding the "not suitable for outdoor use" maybe the thousands of offshore installations with SY widely used outside in the harshest possible conditions got 'the using it outside bit' wrong.....? Hmmmmmm

Cheers for the few sensible replies anyway

 

[Darkwood]

Regarding the "not suitable for outdoor use" maybe the thousands of offshore installations with SY widely used outside in the harshest possible conditions got 'the using it outside bit' wrong.....? Hmmmmmm

Cheers for the few sensible replies anyway

The SY cable we use in the UK is not suitable for outdoor use unless it is protected, it has a low UV tolerance which will quickly see the clear plastic sheath lose its structural integrity where by it will easily crack and let moisture in leading to the corrosion of the braid screening, if used outdoors the manufacturers do state that it must be suitably protected, the cables you talk of used offshore are probably not SY and will cost several times that of the SY we buy off the shelf in the wholesalers.
The S - stands for steel wire braid
The Y - stands for PVC
As you can see this can cover a wide range of similar cables but they made be designed to very different standards depending on their purpose but generally SY is a automation and /or control cable which has a clear PVC sheath to allow for visual inspection and is often used in the rail industries where cables are inspected regular for the safety of the rail network and damage to the cable can be quickly identified.
http://www.elandcables.com/Eland/me...ontrol-Flexible-Cable-to-BS6500.pdf?#zoom=100
To note some SY is made with a black LSZH spec but again this has low UV tolerance.

I can show you plenty of similar cables to SY but they are strictly not SY as the sheath wont be PVC and are usually manufactured for specific industry needs as oppose to general use, I use these cables alot and I believe you may be referring to something similar on the offshore comment IGUS, LAPP are to name a few companies who make specialised cables that would be suitable for such purposes but at a great cost for what OP requires that could be done with a much cheaper solution.

 

[Dozer 73]

You can get outdoor rated cat 5 , has an extra polythene coating , great stuff we use it all the time , or cat 6
Used a lot for cctv now , better in some sort of ducting but not really essential
Or as above armoured cat 5
Prob limited for 100M run ish

 

[Cbuk2k2]

Regarding the "not suitable for outdoor use" maybe the thousands of offshore installations with SY widely used outside in the harshest possible conditions got 'the using it outside bit' wrong.....? Hmmmmmm

Cheers for the few sensible replies anyway

SY is used more for weight saving offshore than anything else though.

 

[Cbuk2k2]

Regarding the "not suitable for outdoor use" maybe the thousands of offshore installations with SY widely used outside in the harshest possible conditions got 'the using it outside bit' wrong.....? Hmmmmmm

Cheers for the few sensible replies anyway

SY is used more for weight saving offshore than anything else though.

 

[Cbuk2k2]

Voice data is very low bandwidth, in the kHz range. You'd get away with using bell wire or T&E if you really wanted. Ethernet has a very small CSA so voltage drop may be a problem