Well you have wasted money then, not to mention the worlds scarce resources of copper.
T&E in conduit in screed?
- Thread starter ToastyToes
- Start date
Well you have wasted money then, not to mention the worlds scarce resources of copper.
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You can't be sure that he has wasted anything.
As already mentioned, screed trunking. It's wide and shallow, and has fittings to bring it up out of the floor.
It's also (if you buy the right stuff) galv steel, which when earthed properly will give you mechanical protection for the cables.
It's also (if you buy the right stuff) galv steel, which when earthed properly will give you mechanical protection for the cables.
Whilst I agree with the spirit of what you are saying/suggesting, your wording could perhaps have been better, since I'm not sure that galvanised steel offers any more 'mechanical protection' when it is 'earthed properly' than when it's not earthed
Kind Regards, John
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In which case it could be done with two by 1.0 mm tripple and earth cables. One common neutral and five switched lives. Might get those in.
I almost mentioned that, but it's not really desirable to have L and N currents to a load travelling in different cables. The ideal would be 7-core cable (one N, 5 switched lives and an earth).
Kind Regards, John
Can't really see a problem when they are both in the same conduit.
[SIMPLES]Avoid all problems of "might get this in" by either using singles in round conduit, or use screed/floor trunking which will have loads room for T&E[/SIMPLES]
Probably not. To be honest, it rarely produces noticeable problems even when the cables are widely separated, let alone not in conduit. However, it remains a theoretically undesirable practice.
Kind Regards, John
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That did occur to me todayWhilst I agree with the spirit of what you are saying/suggesting, your wording could perhaps have been better, since I'm not sure that galvanised steel offers any more 'mechanical protection' when it is 'earthed properly' than when it's not earthed
You are correct, the mechanical protection is the same whether earthed or not - but if it's not earthed then drilling and screwing through it could make it live. It's most likely that the circuits will be RCD protected - but if the trunking is earthed then the cables within it don't need to be (though elsewhere they probably will).Some info on Marshall Tufflex's in-screen trunking http://www.marshall-tufflex.com/in-screed-flooring-system
Also, as a thought, you can get conduit larger than 25mm, I see MT go up to 50mm http://www.marshall-tufflex.com/round-conduit#system-parts You'd get more cables, more easily, into one or two of those than you'd get into a number of small ones.
Don't expect to walk into a local wholesaler and have them admit to existence though
Also, as a thought, you can get conduit larger than 25mm, I see MT go up to 50mm http://www.marshall-tufflex.com/round-conduit#system-parts You'd get more cables, more easily, into one or two of those than you'd get into a number of small ones.
Don't expect to walk into a local wholesaler and have them admit to existence though
That's nothing compared to the waste caused by the countries that use 100-125 Volt supplies.
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