On Wednesday 05 June 2013 12:45 wrote in uk.d-i-y:

Dave Liquorice wrote:
Mains and signal cables inside the same trunking is asking for trouble.

And technically illegal. The OP hasn't said if the run is aerial or
buried.

Surely not illegal, rather contravening the IEE wiring regulations (or
whatever they're called now).

It's also allowed in trunking with physical separation between sections
of the trunking isn't it? (Though that's being a bit picky I must admit)


It's allowed if both cables are rated to the voltage of the higher - though
this may not be the case for standard cat5e.

Having said that, Cat5e is isolated at both ends and often lobbed under
computer room floors or in trunking on top of a load of mains cables so
there isn't really a problem in reality with dry installations.

However, stuck in an underground duct full of water (it may be one day) a
minor failure of the LV (mains) cable insulation could lead to the ELV
cables becoming significantly energised (due to their weaker insulation) and
the possibility of colding a plugged in bare RJ45 whilst standing just
outside the shed on wet grass in flipflops is not totally improbable.

So in this case, fiber, seperate ducts or run the Cat5e in a small flexi
conduit inside the larger duct would seem to be a valid requirement.

--
Tim Watts Personal Blog: http://squiddy.blog.dionic.net/

http://www.sensorly.com/ Crowd mapping of 2G/3G/4G mobile signal coverage

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