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Topic Title: Buried 132kV cables
Topic Summary: Exclusion distance
Created On: 21 January 2019 09:40 AM
Status: Read Only
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 21 January 2019 09:40 AM
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burn

Posts: 328
Joined: 06 June 2003

Does anyone know the exclusion distance for working near underground 132kV cables?
I have made enquiries to operators but they are a bit slow replying, so does anyone have any experience of this?

burn
 21 January 2019 02:11 PM
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OMS

Posts: 22864
Joined: 23 March 2004

For UG cables, there is no statutory distance (you must avoid danger). Typically, we impose 3m clearance for plant or machine excavation on 132kV and at least 1m for any hand digging (in no circumstances is contact with the cable allowed).

If you are in or around the vicinity of the switchyard or substation we tend to prohibit any excavation greater than 300mm in depth unless 3m away from the scanned cable route.

The cable owner probably has guidance (and probably needs to give permission)

Regards

OMS

-------------------------
Let the wind blow you, across a big floor.
 21 January 2019 03:34 PM
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burn

Posts: 328
Joined: 06 June 2003

Thanks OMS,

While we are waiting for the owner to respond and the legals to check permissions we can do some preliminary design work based on 3m.

burn
 21 January 2019 03:53 PM
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johno12345

Posts: 271
Joined: 22 October 2005

they also need positively locating, not relying on the safedig maps

speaking from experience here.
 21 January 2019 05:15 PM
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burn

Posts: 328
Joined: 06 June 2003

Yes, we've had it scanned. And yes it is in in a different place to both the site "as builts" and a trace line on the DNO plans.

burn
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