Electric and data cable in same duct

[Matt L]

Not necessarily. We plow a lot of duct for bt fibre and that is all a very light grey.

 

[BAC]

Not necessarily. We plow a lot of duct for bt fibre and that is all a very light grey.

Mate, I've put plenty of Ducting in. Grey is general bt. For virgin media it is supplied as green

 

[RWG Contracts]

Mate, I've put plenty of Ducting in. Grey is general bt. For virgin media it is supplied as green

Mate

 

[Matt L]

Mate, I've put plenty of Ducting in. Grey is general bt. For virgin media it is supplied as green

Depends on supplier. Bt fibre optic duct comes on 600m drums. We have 12 drums in our yard. 3 where the plow is and another 8 on our lorry ATM.

Not doubting your ducting but one side of our business does it 5 days a week.

 

[Wombat]

Get someone to make you up an armoured fibre optic cable and use that.

 

[TheTallGuy]

Putting power and data together in the same duct is against the wiring regs. except where all cables are rated for the highest voltage present - so for single phase all cables have to be 300V rated and 600V rated for 2/3 phase. The regs. also require you to give proper consideration to interference issues. Whilst SWA will have a natural element of screening as a result of the armour, it shouldn't be considered as such - especially if only terminated at one end. Separate ducts with a nominal spacing of at least 300mm is what I would recommend.

 

[TheTallGuy]

Depends on supplier. Bt fibre optic duct comes on 600m drums. We have 12 drums in our yard. 3 where the plow is and another 8 on our lorry ATM.

Not doubting your ducting but one side of our business does it 5 days a week.

Tele/Datacoms can be grey, white, black, green or purple as per http://www.njug.org.uk/wp-content/uploads/V1-Positioning-Colour-Coding-Issue-8.pdf

 

[Pheasant Surprise]

Surely there must be some other duct you can put down a duct that will protect it? i.e. thread a 2" 'protected' duct down inside a 6" standard duct.

Or would a ferrite work?

@Pheasant Surprise
@Storeman
@Sleepy

one of the above would know I'm sure.

Sorry @Steevo your tag didn't work for me, just stumbled on to this thread.

Good practise to keep power and data as seperate as practically possible. It's not so much a noise issue as safety as pointed out above.

Personally I avoid running copper data cabling between buildings/outside if poss. Admittedly I've done it here, but it's really not great practise again, mainly due to equipotential earth faults. It's easy to zap cards, switches and routers.

Much better if at all poss to run fibre (I use singlemode armoured and stick £100 Netgear switches with slot in SFP fibre interfaces either end). Works a treat and you also don't have to worry about cable separation/extra ducts and electromagnetic noise with fibre.

You can also run it up to about 10 kilometres should you need on what are really very cheap lasers/electronics either end.

 

[Forever Fendt]

Depends on supplier. Bt fibre optic duct comes on 600m drums. We have 12 drums in our yard. 3 where the plow is and another 8 on our lorry ATM.

Not doubting your ducting but one side of our business does it 5 days a week.

sounds like you have a missing roll of duct then

 

[sleepy]

Sorry @Steevo your tag didn't work for me, just stumbled on to this thread.

Good practise to keep power and data as seperate as practically possible. It's not so much a noise issue as safety as pointed out above.

Personally I avoid running copper data cabling between buildings/outside if poss. Admittedly I've done it here, but it's really not great practise again, mainly due to equipotential earth faults. It's easy to zap cards, switches and routers.

Much better if at all poss to run fibre (I use singlemode armoured and stick £100 Netgear switches with slot in SFP fibre interfaces either end). Works a treat and you also don't have to worry about cable separation/extra ducts and electromagnetic noise with fibre.

You can also run it up to about 10 kilometres should you need on what are really very cheap lasers/electronics either end.

This, running copper data cable between buildings is basically a really bad idea. Just use fibre or WiFi.

 

[zyklon]

Depends on the run. If it's 10m etc then cat will be fine

 

[sleepy]

Depends on the run. If it's 10m etc then cat will be fine

Not if the buildings are on different phases / earth potentials.

But I agree in principle a very short run betwen two very close buildings will be ok.

 

[Matt L]

sounds like you have a missing roll of duct then

Not yet. Have 23 in total in and around the job sites. Just worded it badly

 

[Lewis]

got about 200m of 50mm 4 core armoured cable to put in soon for a new build. how deep should it be buried. its across rough permanent pasture which will likely never see a plough.
cheers

 

[TheTallGuy]

At least 700mm ideally. It's easy to say that the ground won't be disturbed now, but things may change in 10 years time...

 

[zyklon]

I'm not sure if there is a set regulation for burial depth but I know you lay it as deep as you can. I put my last one in 6ft deep because I had an issue at a previous new build I was doing in which I had to dig a few rain channels and the bloody mains cable wasn't in deep enough and it interfered with digging. Never again.

 

[Lincsman]

1 metre covered with 200mm of sand and then taped.

 

[Steevo]

As deep as you can.

 

[Pheasant Surprise]

1 metre covered with 200mm of sand and then taped.

That's good advice. I'd be inclined to leave a slightly bigger gap between the tape and the cable/duct the deeper you dig them in - just that little bit earlier insurance when you're looking for it....or not.

 

[Matt L]

Gap of 200 is usually the minimum and also the standard which then gives some idea of how deep under the tape. If you can afford it go for tile boards rather than tape as tape can discolour and move as trenches settle. Also dig as narrow a trench as you can and try to lay the tape right over the top of the cable rather than zig zagging across a wide trench.