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Default Overhead mains feed outdoors - rules?

OK, I know Part P applies, but still.....

What are the rules/requirements for overhead cables? I want to run a
short feed to a shed from the existing consumer unit in our garage. It
will (probably) be 2.5sq mm run from a 20 amp RCBO. The overhead bit
will only be two or three metres.

So is it OK to run standard T&E cable in flexible plastic conduit, the
ribbed stuff, and suspend it from a catenary wire. ... or would it be
better to use SWA, naked or in conduit as above?

Are there any specific rules about maximum span etc.?

--
Chris Green
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Default Overhead mains feed outdoors - rules?

On 26/01/2019 09:30, Chris Green wrote:
OK, I know Part P applies, but still.....

What are the rules/requirements for overhead cables? I want to run a
short feed to a shed from the existing consumer unit in our garage. It
will (probably) be 2.5sq mm run from a 20 amp RCBO. The overhead bit
will only be two or three metres.

So is it OK to run standard T&E cable in flexible plastic conduit, the
ribbed stuff, and suspend it from a catenary wire. ... or would it be
better to use SWA, naked or in conduit as above?

Are there any specific rules about maximum span etc.?


T&E in conduit (I think you mean Kopex or similar) will be fine. I would
probably use naked SWA. Both need a catenary wire.





--
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Default Overhead mains feed outdoors - rules?

On 26/01/2019 09:55, ARW wrote:
On 26/01/2019 09:30, Chris Green wrote:
OK, I know Part P applies, but still.....

What are the rules/requirements for overhead cables?* I want to run a
short feed to a shed from the existing consumer unit in our garage. It
will (probably) be 2.5sq mm run from a 20 amp RCBO.* The overhead bit
will only be two or three metres.

So is it OK to run standard T&E cable in flexible plastic conduit, the
ribbed stuff, and suspend it from a catenary wire.* ... or would it be
better to use SWA, naked or in conduit as above?

Are there any specific rules about maximum span etc.?


T&E in conduit (I think you mean Kopex or similar) will be fine. I would
probably use naked SWA. Both need a catenary wire.





My neighbour has T&E cable tied to steel cable over 8 metres or so. It
would have been installed by a tradesman.

I'd use SWA if it stood much chance of being knocked accidentally,
otherwise your way sounds ok. You can get red plastic round conduit
which shows up well (though not corrugated AFAIC).
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Default Overhead mains feed outdoors - rules?

On 26/01/2019 10:25, newshound wrote:
snip
I'd use SWA if it stood much chance of being knocked accidentally,
otherwise your way sounds ok. You can get red plastic round conduit
which shows up well (though not corrugated AFAIC).


Over 8 metres I'd be inclined to look at NYY-J as a bit lighter and (for
me at least) easier to work with. Can be bought by the metre like SWA.

And (with apologies if it's the bleeding obvious) they're all solid
conductors so need to be fitted so they don't flex (sic) in the wind.


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Default Overhead mains feed outdoors - rules?

Robin wrote:
On 26/01/2019 10:25, newshound wrote:
snip
I'd use SWA if it stood much chance of being knocked accidentally,
otherwise your way sounds ok. You can get red plastic round conduit
which shows up well (though not corrugated AFAIC).


Over 8 metres I'd be inclined to look at NYY-J as a bit lighter and (for
me at least) easier to work with. Can be bought by the metre like SWA.

And (with apologies if it's the bleeding obvious) they're all solid
conductors so need to be fitted so they don't flex (sic) in the wind.

OK, thanks all. I might go with SWA then, I think I have some 'in
stock'. As I said it's only going to be a two or three metre span.

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Default Overhead mains feed outdoors - rules?

On Sat, 26 Jan 2019 09:55:42 +0000, ARW wrote:

On 26/01/2019 09:30, Chris Green wrote:
OK, I know Part P applies, but still.....

What are the rules/requirements for overhead cables? I want to run a
short feed to a shed from the existing consumer unit in our garage. It
will (probably) be 2.5sq mm run from a 20 amp RCBO. The overhead bit
will only be two or three metres.

So is it OK to run standard T&E cable in flexible plastic conduit, the
ribbed stuff, and suspend it from a catenary wire. ... or would it be
better to use SWA, naked or in conduit as above?

Are there any specific rules about maximum span etc.?


T&E in conduit (I think you mean Kopex or similar) will be fine. I would
probably use naked SWA. Both need a catenary wire.


Mine's about 2m, FT&E supported with green-coated garden wire from Wickes
(steel but easy to manipulate) and a couple of vine eyes.
Probably withstand a gentle knock from a ladder.
The FT&E that was replaced had been there for ~30 years and was still
flexible - but I cut it up so that it was useless.
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Default Overhead mains feed outdoors - rules?

On 26/01/2019 09:30, Chris Green wrote:

OK, I know Part P applies, but still.....


Just being outside no longer brings it into the category of "notifiable"
jobs for part P now.

What are the rules/requirements for overhead cables? I want to run a
short feed to a shed from the existing consumer unit in our garage. It
will (probably) be 2.5sq mm run from a 20 amp RCBO. The overhead bit
will only be two or three metres.

So is it OK to run standard T&E cable in flexible plastic conduit, the
ribbed stuff, and suspend it from a catenary wire. ... or would it be
better to use SWA, naked or in conduit as above?


Either is ok, I would probably use SWA.

Are there any specific rules about maximum span etc.?


As long as its properly supported then its fine.

--
Cheers,

John.

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Default Overhead mains feed outdoors - rules?

On 26/01/2019 20:26, John Rumm wrote:
On 26/01/2019 09:30, Chris Green wrote:

OK, I know Part P applies, but still.....


Just being outside no longer brings it into the category of "notifiable"
jobs for part P now.

What are the rules/requirements for overhead cables?* I want to run a
short feed to a shed from the existing consumer unit in our garage. It
will (probably) be 2.5sq mm run from a 20 amp RCBO.* The overhead bit
will only be two or three metres.

So is it OK to run standard T&E cable in flexible plastic conduit, the
ribbed stuff, and suspend it from a catenary wire.* ... or would it be
better to use SWA, naked or in conduit as above?


Either is ok, I would probably use SWA.

Are there any specific rules about maximum span etc.?


As long as its properly supported then its fine.


If I were doing it, I'd probably consider running SWA in Unistrut.

SteveW
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