It would corrode the conduit from the inside and eventually perforate it.
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T and E outside?
- Thread starter Jake2021
- Start date
Although rethinking this one, I'd use 3 core SWA and as £2 per metre for a 25M coil from Toolstation, this would be the safest option.
I can think of no reason for not using T+E underground, provided that it has adequate (and lasting') mechanical protection.
T+E in metal conduit is not materially different from SWA, is it?
I suppose so, but I think that 'eventually' could be an extremely long time
... and 'perforations', per se, would presumably have no adverse effect - only if the conduit completely disintegrated would it cease providing mechanical protection to the cableLast year I removed some galvanised steel conduit (definitely without sealed joints!) which had been buried in my garden since before I moved in (maybe long before), over 40 years ago, and it was still fine, other than for some patches of surface corrosion.
Having said all that, like you I would use SWA, even though it provides much less mechanical protection than steel conduit.
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