Minimum distance between electrical and Cat3 feeds FREE cabling and networking Helpdesk
 Question by Steve Nelson posted 12 Oct 2000
 Minimum distance between electrical and Cat3 feeds
I am working on a project involving burying 1 electrical feed in a PVC conduit and another PVC conduit carring Cat 3 voice. What is the minium distance they can be buried from each other?
 Answer by Roman Kitaev posted 12 Oct 2000
Hi, Steve!

The BICSI TDDM manual says that a joint-trench method is used, the following vertical and horizontal separations must be maintained between telecom direct-buried cables or telecom cables placed in underground pathways and power or other foreign conduit:

- 300 mm (12 in) of well-tamped earth
- 100 mm (4 in) of masonry
- 75 mm (3 in) of concrete

Best regards
Roman Kitaev, RCDD

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