Underground street lighting duct types

[sunesha sunny]

Hi All,

I am preparing a document where i need to understand the street lighting duct types used in UK.
Could someone help me with the street lighting duct types and sizes normally used in UK.
Preferred sizes are 50mm, 75mm, 100mm and 150mm.

If not could you guide me to someone who could help me.

Regards,
Sunesha

 

[Pete999]

Not had much to do with street lighting, what is "street lighting duct types"? that's a new one on me.

 

[sunesha sunny]

Street lighting ducts are in which cables are laid if not buried barely that suppies street lighting columns.
Some of the types are PVC, MDPE, HDPE ducts. but i do not know how different it would be for each type in terms of the size ,flexibility , space factor etc.
Street lighting ducts would be normally orange in color if i am not wrong.
Something similar to the below.

Regards,
Sunesha

 

[westward10]

It is the same here, orange in colour manufactured to BS EN 50086-2-4 and made with MDPE or HDPE. Sizes can vary.

 

[Specialist]

Only really been involved in Street lighting when wiring private housing estates, main contractor used to install 75mm flexible ductwork usually.

 

[Specialist]

Street lighting ducts are in which cables are laid if not buried barely that suppies street lighting columns.
Some of the types are PVC, MDPE, HDPE ducts. but i do not know how different it would be for each type in terms of the size ,flexibility , space factor etc.
Street lighting ducts would be normally orange in color if i am not wrong.
Something similar to the below.

Regards,
Sunesha

That's the stuff, couldn't for the life of me remember what it was made of.

 

[sunesha sunny]

Are not PVC ducts used anymore?

Could you provide me with the different sizes of HDPE and MDPE ducts used?
And when do we prefer HDPE/MDPE over PVC.

Are they rigid? if so will the bending be difficult? and should we need chambers for bents even less than 90 degrees?

Regards,
Sunesha

 

[Ian1981]

Never seen it used personally and been on quite a lot of new build sites(maybe they are different?)
All I see is the main cable for different houses and a torpedo joint with the cable coming off it into the bottom of the lampost

 

[Specialist]

Never seen it used personally and been on quite a lot of new build sites(maybe they are different?)
All I see is the main cable for different houses and a torpedo joint with the cable coming off it into the bottom of the lampost

Never seen it done like that, all sites we did had service huts & the street lighting was fed from them.

 

[Ian1981]

Never seen it done like that, all sites we did had service huts & the street lighting was fed from them.

See it all the time on every site.
Joint is located right near the post.
Perhaps reference to the so called 3 meter ruling

 

[Specialist]

Think your talking about about public lighting systems buddy. What I'm talking about was private Street lighting systems on small estates, the street lighting being supplied & run by whatever association or charity owned the estate.

 

[westward10]

I thought it was a requirement to place cables within orange ducting.

 

[Ian1981]

Think your talking about about public lighting systems. What I'm talking about was private Street lighting systems on small estates, the street lighting being supplied & run by whatever association or charity owned the estate.

That'll be why then bud

 

[Ian1981]

I thought it was a requirement to place cables within orange ducting.

It could well be a requirement it's not something I'm aware of , not had anything to do with it before it's just what I see.
Some supply cables aren't even ducted sometimes (unclear as to what the requirements actually are)as well but that's for northern power or whoever they get to install it's problem.

I'll have to take some photos next time I'm on a site

 

[sunesha sunny]

Its public street lighting that i am referring to.

 

[Specialist]

That'll be why then bud

Could well be mate , unfortunately I never got the opportunity to get into public lighting .

 

[Ian1981]

Anyone on the forums worked for a DNO?

 

[Specialist]

I thought it was a requirement to place cables within orange ducting.

As far as I remember it was, that's what we always did anyway.

 

[Ian1981]

As far as I remember it was, that's what we always did anyway.

Like I said a torpedo joint is installed and a cable fed off it to the lampost as close as practically possible usually within 1-2 meters id say so perhaps no need to duct it as there's not a great deal of length.
I've not seen how every lampost is supplied mind just the odd one where the road is still dug up.

Anyway sorry for hijacking the thread

 

[westward10]

The cables between the joints must be ducted?

 

[Pete999]

Street lighting ducts are in which cables are laid if not buried barely that suppies street lighting columns.
Some of the types are PVC, MDPE, HDPE ducts. but i do not know how different it would be for each type in terms of the size ,flexibility , space factor etc.
Street lighting ducts would be normally orange in color if i am not wrong.
Something similar to the below.

Regards,
Sunesha

Thanks wasn't sure what you were on about, perhaps if you had described the kit as cable ducting.

 

[westward10]

What document are you trying to prepare. You could try contacting the ILE (Institute of Lighting Engineers) who may give you more detailed information.

 

[davesparks]

I thought it was a requirement to place cables within orange ducting.

on highways etc there is colour coding to the ducts, I think it's something like black is electricity, orange traffic lights, green telecoms, yellow gas etc etc
On private land you can do whatever you like

 

[Dave OCD]

In Cornwall the policy was always utilising the DNO network for supplies to public lighting, this was mainly to avoid the problems that come with being responsible for maintaining and rectifying faults on the supply network and the cost implications. This is always in black ducting and generally there would be a 'hockey stick' arrangement at the lighting columns connected into the ducting to achieve the desired bending radius. However some supplies were fed via 'private' SWA cabling either from existing lighting columns or feeder pillars such as traffic bollard islands and signs on roundabouts as well as traffic signal installations. These supplies would always be in orange ducting. Generally 50mm ducting is used but signals generally need larger or multiple ducts back to the junction controller. Is anyone still awake.... ?

 

[Dave OCD]

on highways etc there is colour coding to the ducts, I think it's something like black is electricity, orange traffic lights, green telecoms, yellow gas etc etc
On private land you can do whatever you like

I'm not so sure about that, you wouldn't want a live cable encased in blue or yellow really ?
Actually I'm surprised at you posting that Dave, imagine the implications of someone cutting into a blue pipe which would normally carry water and suddenly there's a big bang and flash...

 

[davesparks]

I'm not so sure about that, you wouldn't want a live cable encased in blue or yellow really ?
Actually I'm surprised at you posting that Dave, imagine the implications of someone cutting into a blue pipe which would normally carry water and suddenly there's a big bang and flash...

I wouldn't want a cable run in a blue or yellow duct, but I am not aware of any regulation s which prevents you doing so on private land if you so wish.

 

[Dave OCD]

No I'm not aware of any either but common sense comes into play with that one - hopefully !

 

[Rocboni]

All street lighting cables and ducts installed by the councils in Scotland are purple/violet.

BS5467 STEEL WIRE ARMOURED CABLE - VIOLET - https://www.superlecdirect.com/cables-and-accessories-c1/bs5467-steel-wire-armoured-cable-violet-s245/

 

[davesparks]

No I'm not aware of any either but common sense comes into play with that one - hopefully !

I'm not convinced that there is much common sense left in the world, especially considering a few recent threads here.

 

[dmxtothemax]

I always thought that the orange color conduit signified HIGH DENSITY which is used outdoors and underground, as opposed to the normal grey or whites which are used indoors ?
and conduit and ducting are different things to me ?

 

[Rocboni]

Ducts also available in 53mm and 90mm, I would say 90 is most common


PURPLE CABLE DUCT, DUCTING, SCOTLAND SCOTTISH UNDERGROUND STREET LIGHTING CABLE DUCT DUCTING DUCTS - http://www.cablejoints.co.uk/sub-product-details/polypipe-cable-duct/purple-cable-ducts