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Topic Title: Bend Radius
Topic Summary: 90 deg corners with SWA
Created On: 18 June 2007 11:17 AM
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 18 June 2007 11:17 AM
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p1948040

Posts: 22
Joined: 10 May 2006

morning all.

Looking at a job running SWA cable in a garden, clipped around a wall and I am wondering which techniques I could use to ensure minimum bend radius is maintained on 90deg corners. Any tips ?

For example running 2.5mm 6943X 3 core with OD 14mm, requires a minimum bend radius of 84mm as per table 4E OSG. This will present quite a large loop.

Any tips experience appreciated
Martin
 18 June 2007 11:33 AM
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perspicacious

Posts: 7244
Joined: 18 April 2006

If cosmetic is a client issue and wall corners cannot be "notched", why not give the client a spade?

Regards

BOD
 18 June 2007 02:02 PM
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philipwright2

Posts: 745
Joined: 28 January 2006

Do you need 3 cores? How about using a 2 care cable and use the sheath of the SWA for the earth - if it's practicable of course.

I have seen the hypotenuse drilled, to in effect produce 2 x 45 degree bends instead of 1 x 90. Or just notch out the joint as BOD suggested - if it's really a cosmetic problem though perhaps your choice if wiring might be considered? Perhaps steel tube?

-------------------------
Regards
Phil


I will not cease from mental fight,
nor shall my sword sleep in my hand,
till we have built Jerusalem
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 18 June 2007 02:33 PM
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p1948040

Posts: 22
Joined: 10 May 2006

good ideas thanks.

The customer will definitely be doing the digging part, I have made that clear from the outset!

yes 2-core could be an option, every bit helps. Not sure about steel tube though.

thanks
 18 June 2007 05:24 PM
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AJJewsbury

Posts: 11553
Joined: 13 August 2003

If there's space and aethetics allow, could you have two 90-degree bends instead of one? (that sounds daft! - I'll try to explain... ) - e.g. if the cable's running horizontally around a 90 degree corner, turn upwards (or downwards) with the 1st bend and then back horizontally along the other wall with the 2nd bend. Probably works better with internal rather than external corners and the two horizontal runs would be a different heights, but allows each bend to be as smooth as you like.
- Andy.
 18 June 2007 05:35 PM
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impvan

Posts: 791
Joined: 07 September 2005

You could do the same job with 2L2.5 MICC, with an O/D about the same as a pencil.....
 18 June 2007 05:37 PM
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Avatar for potential.
potential

Posts: 1277
Joined: 01 February 2007

Originally posted by: AJJewsbury

If there's space and aethetics allow, could you have two 90-degree bends instead of one? (that sounds daft! - I'll try to explain... ) - e.g. if the cable's running horizontally around a 90 degree corner, turn upwards (or downwards) with the 1st bend and then back horizontally along the other wall with the 2nd bend. Probably works better with internal rather than external corners and the two horizontal runs would be a different heights, but allows each bend to be as smooth as you like.

- Andy.


Yes, this is the way I'd do it.
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