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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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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?
 05 December 2012 03:21 PM
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Posts: 12901
Joined: 13 August 2003

what sort of voltages are we talking about?
- Andy.
 05 December 2012 03:56 PM
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Posts: 20560
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



Let the wind blow you, across a big floor.

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