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Services in a trench


M107

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Anybody know of any building regulation that will stop a swa submain & a water supply sharing the same trench?

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Evans Electric

I don't know one other than perhaps the standard separation from other services ,150mm

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Yes 150mm (although cant remember where I picked that up from) thats what I've put in a quote, but the customer has called & said they've been told there has to be 1 meters seperation in the same trench or seperate trenches?:|

New one on me.

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Evans Electric

Me too . Could always ask your scam provider's technical help service.

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green-hornet

There is only one difference, and that is depth of buried supply.

Most new water supplies in plasic have to be buried far deeper than any elecxtrical cable.

So in essence an electric cable can be buried alongside a water cable without any seperation requirements other than the bs 7671 wiring regulations as to seperation from other services, which I would suggest is only 50mm.

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NozSpark

My brother was told 300mm (every direction) by his LABC!!

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SPECIAL LOCATION
Yes 150mm (although cant remember where I picked that up from) thats what I've put in a quote, but the customer has called & said they've been told there has to be 1 meters seperation in the same trench or seperate trenches?:|

New one on me.

In the words of my Chinese friends "Vats O Rowd Ov Borrox"!

If you have a copy of Guidance note 1, Selection & erection

page 107 has an example of typical layouts & depths of services in a 2m wide footpath...

which is a picture like this!

which is from the "National Joint utilities group". (JUG) agreed guidance for depth colour etc, etc, for preferred use in public highways..

Their guidance only has 860mm seperation!!!!

Although this again is just guidance... if less than 1m is OK under the public highway then it surly its ok for other private ducts.;)

I cannot see any specific reg or guidance in BIG RED or Guidance note 1

which stipulates a specific depth or seperation..

Just the normal common sense stuff such as take account of....

probability of ground movement.

surface traffic.

adjacent foundations.

likelihood of digging, manual or mechanical..

etc.

Most important that whatever is buried, it is clearly marked, as to its route depth etc... and Identified on plans or drawings for later reference!:|;)

At the end of the day I think its a bit of an individual discretion type choice!

but I may have to sit with my pants on my head for a week if some other more cleverer person can provide better info!:|;)

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There is only one difference, and that is depth of buried supply.

Most new water supplies in plasic have to be buried far deeper than any elecxtrical cable.

So in essence an electric cable can be buried alongside a water cable without any seperation requirements other than the bs 7671 wiring regulations as to seperation from other services, which I would suggest is only 50mm.

is that a new style of cable or something, :^O:^O:^O:^O:^O:^O

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SPECIAL LOCATION
is that a new style of cable or something, :^O:^O:^O:^O:^O:^O

ROTFWLROTFWLROTFWLROTFWLROTFWLROTFWL

Applaud SmileyApplaud SmileyApplaud SmileyApplaud SmileyApplaud Smiley

well spotted Badge!:x:D

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is that a new style of cable or something, :^O:^O:^O:^O:^O:^O

They are designed specifically for use on Water beds. :)

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green-hornet

Lol I never saw that ROTFWL

now that would be a thing wonder if its already patented.

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