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Topic Title: Cable trench for DC cables
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Created On: 05 December 2012 03:10 PM
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 05 December 2012 03:10 PM
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dimcha

Posts: 3
Joined: 10 May 2012

I would appreciate if someone could provide some standards regarding the installation (e.g clearance) of DC power cables buried in a trench.

Are they any specs when installing lots of DC power cables in the same trench?
Thanks.
 05 December 2012 03:21 PM
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AJJewsbury

Posts: 11493
Joined: 13 August 2003

what sort of voltages are we talking about?
- Andy.
 05 December 2012 03:56 PM
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Avatar for OMS.
OMS

Posts: 19688
Joined: 23 March 2004

Keep +ve and -ve close together (for each circuit) - ideally use earthed metal containment (SWA cable is ideal) to get a bit of inductance to damp potential inductive surges . Then provide seperation of at least 2 x cable diameter from each circuit.

Personally, I'd be using a pit and duct system with min 100mm dia ducts - one per circuit

Use labelling tapes warning of what's below if you do bury direct or the same above the duct if you go that way

Regards

OMS

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