Running 35mm armoured overhead

[Robertbaker63]

A farmer wants me to run a new supply to a building, it's to be run in 35mm armoured, part of the route is a 25m overhead span between buildings, is this okay for the cable or should I be getting an extra pole in the middle put in to take the weight

 

[telectrix]

is going underground out of the question?

 

[Pete999]

25 of 35mm SWA is going to be heavy, very heavy, as Tel asked why can't you take it underground between the two buildings? I expect like most Farmers they want a cheap job and b--ger the safety aspect. The regulations tell you the spacing for horizontal and vertical clipping etc, I would of thought that experience would tell you that the method you are talking about is IMO a no no.

 

[Sintra]

How many cores in this cable? I'm asking this so that you think about the weight of the cable across the span. For example a 3 core 35mm weighs approximately 2Kg/M so this would be 50Kg. Imo this should be supported across the full length of the span using an appropriate catenary system.

 

[Darkwood]

A cable of that size run overhead should be fully supported and usually with heavy duty cable ladder, this would also require frequent support poles as you have to account for the weight of the ladder too and its max unsupported recommendations (at a guess every 5m) and been a farm then at a suitable height for farm plant to cross under even with any folks etc raised.

I would be seriously looking into burying this given the cost and obvious hazards having a overhead system with multiple supports would present on a farm.

 

[Robertbaker63]

Yes it's 3 core armoured, the overhead part is not in a.through vehicle route and not possible to go underground as it's over a few smaller sheds

 

[Darkwood]

Can a ladder system be fixed to the existing sheds, plus what stops you going around the sheds - a straight line isn't always possible .... just shots in the dark of course but info for us is lacking.

 

[atm84]

What about using a catenary wire. You can then cable tie it to that but like already said, try to work out the weight of the cable first.

 

[Deleted member 72666]

is going underground out of the question?

Dunno! Ask Paul Weller!

 

[atm84]

What's the supply for, have you carried out cable calcs. Is 35mm2 required.

 

[ImpededLoop]

What are the 3 cores for? If one is cpc you could consider omitting that and use the armouring or TT the new installation.

 

[davesparks]

Would it not be better off run in hard drawn overhead cable?

 

[nickblake]

What about using a catenary wire. You can then cable tie it to that but like already said, try to work out the weight of the cable first.

35mm SWA on a catenary wire cable tied ,imagin that in the wind would last 5 mins , only real method for that enviroment is under ground in ducting

 

[Brightspark2]

35mm SWA on a catenary wire cable tied ,imagin that in the wind would last 5 mins , only real method for that enviroment is under ground in ducting

I've seen a lot bigger than 35mm on a catenary wire!!!...still hanging on in there lol

 

[shanky887614]

I've seen a lot bigger than 35mm on a catenary wire!!!...still hanging on in there lol

unsupported over 25m?