IET
Decrease font size
Increase font size
Topic Title: Galvanised Trunking Outside
Topic Summary:
Created On: 11 July 2018 02:13 PM
Status: Read Only
Linear : Threading : Single : Branch
1 2 Next Last unread
Search Topic Search Topic
Topic Tools Topic Tools
View similar topics View similar topics
View topic in raw text format. Print this topic.
 11 July 2018 02:13 PM
User is offline View Users Profile Print this message



LACarbon

Posts: 22
Joined: 15 March 2018

Hi all,

Opinions/regs on installing galv trunking to external walls (open to the elements as it were). Am i right in the minimum rating should be IP4X?

I am certain over a period of time the trunking will show signs of rusting being open to adverse weather conditions. Also screw holes/lid would allow ingress of water?

Carbon
 11 July 2018 02:19 PM
User is offline View Users Profile Print this message



dustydazzler

Posts: 2701
Joined: 19 January 2016

I personally don't like galv trunk outside
 11 July 2018 02:28 PM
User is offline View Users Profile Print this message



LACarbon

Posts: 22
Joined: 15 March 2018

I personally don't like galv anywhere moisture or damp can arise, inside or out.
 11 July 2018 02:36 PM
User is offline View Users Profile Print this message



mapj1

Posts: 11436
Joined: 22 July 2004

Well, don't put anything in the trunking that matters if it gets wet, as it will. Maybe IP44. I do not think the regs say anything on this as it's not normally put out in the rain.

-------------------------
regards Mike
 11 July 2018 02:39 PM
User is offline View Users Profile Print this message



dustydazzler

Posts: 2701
Joined: 19 January 2016

Vertical galv trunk would make a nice downpipe
 11 July 2018 02:43 PM
User is offline View Users Profile Print this message



broadgage

Posts: 2976
Joined: 07 August 2007

I agree that galvanised trunking outdoors should be avoided.
If for some special reason it is to be used, then IMHO it should be considered only as extra protection against mechanical damage, and that cables therein should be suitable for outdoor use.
 11 July 2018 02:54 PM
User is offline View Users Profile Print this message



LACarbon

Posts: 22
Joined: 15 March 2018

Thanks guys

Doesn't make a great down pipe either as water seeps out the sides

I couldn't find anything in the regs to say you couldn't either, I also didn't see anything that said I couldn't run my cables through puddles either but just because it isn't in the regs doesn't mean its okay to do

I personally think SWA should be the way to go

Carbon
 11 July 2018 02:56 PM
User is offline View Users Profile Print this message



dustydazzler

Posts: 2701
Joined: 19 January 2016

Swa , or Sy
 11 July 2018 03:09 PM
User is offline View Users Profile Print this message



dustydazzler

Posts: 2701
Joined: 19 January 2016

Originally posted by: LACarbon

Thanks guys



Doesn't make a great down pipe either as water seeps out the sides



I couldn't find anything in the regs to say you couldn't either, I also didn't see anything that said I couldn't run my cables through puddles either but just because it isn't in the regs doesn't mean its okay to do



I personally think SWA should be the way to go



Carbon


Just seal the edges with window sealant
 11 July 2018 03:22 PM
User is offline View Users Profile Print this message



LACarbon

Posts: 22
Joined: 15 March 2018

Funnily enough, sealant was a recommendation for the trunking
 11 July 2018 03:23 PM
User is offline View Users Profile Print this message



dustydazzler

Posts: 2701
Joined: 19 January 2016

Could always paint it with exterior metal paint ,

Nice shade of green would look nice
 11 July 2018 04:46 PM
User is offline View Users Profile Print this message



deleted_1_vstrom1000

Posts: 60
Joined: 09 July 2018

[text in this post removed]

Edited: 25 July 2018 at 09:57 AM by IET Moderator
 11 July 2018 05:15 PM
User is offline View Users Profile Print this message



Zoomup

Posts: 5266
Joined: 20 February 2014

Certain metal trunking makers make a big thing of their product being IPX4 to keep out solid stuff like wires of 1.0mm dia or bigger up to 100mm long, but who would want to push a bare wire into trunking anyway? There is no discussion of keeping the rain out though.

http://www.youtube.com/watch?v=ePPliyKd_Ow

Z.
 12 July 2018 09:53 AM
User is online View Users Profile Print this message



AJJewsbury

Posts: 17321
Joined: 13 August 2003

Am i right in the minimum rating should be IP4X?

The general requirement for trunking (containing unsheathed singles) is IP4X or IPXXD. IPXXD allows much bigger holes (up o 35mm across in some circumstances) provided the test probe is still clear of live parts. Neither rating of course provide any protection against water entry.

Certain metal trunking makers make a big thing of their product being IPX4 to keep out solid stuff

IP4X surely - IPX4 is protection from splashes (but no specified protection against solids)

- Andy.
 12 July 2018 10:59 AM
User is offline View Users Profile Print this message



deleted_1_vstrom1000

Posts: 60
Joined: 09 July 2018

[text in this post removed]

Edited: 25 July 2018 at 09:57 AM by IET Moderator
 12 July 2018 11:19 AM
User is offline View Users Profile Print this message



tattyinengland

Posts: 1044
Joined: 23 November 2006

Definitely no to metal trunking run outside for me.

I would be willing to guarantee rust all over the show - even if only in the fixing holes, but probably at every cut (the installer - such as myself) - is unlikely to galv paint every cut joint perfectly and fixing hole.

If I had to run many circuits in this metal trunking, I'd be more likely to run a sub distribution supply to a new DB and then take my many circuits from there. Sub distribution circuit run outside in SWA perhaps.
 12 July 2018 02:12 PM
User is offline View Users Profile Print this message



mikejumper

Posts: 2614
Joined: 14 December 2006

Originally posted by: tattyinengland
Definitely no to metal trunking run outside for me.

I agree.

As bad as using galvanised steel profiles on the corners of rendered external walls.
 12 July 2018 04:06 PM
User is offline View Users Profile Print this message



chrispearson

Posts: 653
Joined: 15 February 2018

Could we know a little more about the work please? Would conduit be too small?
 12 July 2018 04:40 PM
User is offline View Users Profile Print this message



Zoomup

Posts: 5266
Joined: 20 February 2014

IP4X. Blinkin ek, my eyes are shot and now my fingers are working in reverse. I think it's time to hang up the neon tester and take up gardening.

Z.
 12 July 2018 05:18 PM
User is offline View Users Profile Print this message



leckie

Posts: 4705
Joined: 21 November 2008

Well if you have deep pockets you can use IP66 trunking.

http://lasnek.com/products-uk/ip66-trunking

It probably wouldn't be on a general specification, but if you are looking for a link been buildings, perhaps to a plant room, then it's worth considering.
IET » Wiring and the regulations » Galvanised Trunking Outside

1 2 Next Last unread
Topic Tools Topic Tools
Statistics

New here?


See Also:



FuseTalk Standard Edition v3.2 - © 1999-2018 FuseTalk Inc. All rights reserved.

 
..