Could this lead to future problem?

[SSE]

Went to wire out a small garage today & the owner had already ran the SWA in. He's got it in ducting underneath the patio but he's obviously went & took it through the garage floor when the cement was wet or poured the cement in all round the cable. It's not in ducting in the garage, instead is solid in cement apart from a meter above his now solid cement. Will this cement over time, damage the cable?

 

[markc123]

It'll be fine.

 

[Rockingit]

^^^ agreed.

 

[monkeyelectric]

Don't worry about it, i've done it before with no adverse effects to date

 

[dan86]

Think you've got your answer!
was the customer running the SWA himself pre agreed with you? how do you know it's in ducting...

 

[GLENNSPARK]

Went to wire out a small garage today & the owner had already ran the SWA in. He's got it in ducting underneath the patio but he's obviously went & took it through the garage floor when the cement was wet or poured the cement in all round the cable. It's not in ducting in the garage, instead is solid in cement apart from a meter above his now solid cement. Will this cement over time, damage the cable?

what CSA has he run?..
its just that if its a 2.5 then you will be limited to 20A top end....
which will be an issue at the garage end (think 16 & 6)

 

[chopper76]

Should be fine, but I would export an earth with/within it, if the lime in the cement rots the steel armouring over time ( if ), yourd least of kept the earth path

 

[Marvo]

It's a shame he didn't continue the ducting all the way, it would probably have proved valuable in the future but I wouldn't see a problem with SWA in cement unless it's prone to physical damage where it exits the slab. You can always IR test the steel armour to a known earth before you connect it up, if it's a good reading then you know the PVC sheath is in tact.

 

[GLENNSPARK]

Should be fine, but I would export an earth with/within it, if the lime in the cement rots the steel armouring over time ( if ), yourd least of kept the earth path

give up!!!
its PVC sheathed.....and as long as the armourings are tied to earth top end....

 

[Fin170]

Should be fine, but I would export an earth with/within it, if the lime in the cement rots the steel armouring over time ( if ), yourd least of kept the earth path

Im on a job with very old SWA (i.e. no outer sheath, just bare armour) and out of the hundreds of them passing through hundreds of concrete penetrations there is no sign of degrading over the near 60 years it's been there. I would not be worried

 

[SSE]

Thanks guys, I wasn't so sure. I'll maybe mark down on the test certificate the supply has been installed by someone else just in case. I can only go by what he's saying that it's in ducting, he did show me the spare ducting he had left so pretty sure he has. If only he'd consulted me before asking me to do the job I could have made sure it was in properly, he obviously wanted to save some coin by putting it in himself, tight a**e! He's managed to get the correct cable size required (6mm) so it's not all bad!

 

[Knobhead]

give up!!!
its PVC sheathed.....and as long as the armourings are tied to earth top end....

Another one that doesn't know how to correctly test a U/G SWA.

A sheath test will tell you if the outer serving has been damaged. Cement won’t damage the serving, mechanical damage is always a problem.

The problem comes if the sheath test fails, you have to find the damaged section.

 

[Rockingit]

Another one that doesn't know how to correctly test a U/G SWA.

A sheath test will tell you if the outer serving has been damaged. Cement won’t damage the serving, mechanical damage is always a problem.

The problem comes if the sheath test fails, you have to find the damaged section.

Can't say that I can remember the method for this either (though have some vague distant memories). Care to remind me?

 

[Guest55]

fit tempory metal stake or rod into ground near to where cable exits the ground
using a ins. res. tester at 500v , test between cable armouring and stake / rod.
make sure the other end of cable is not in contact with ground / floor during test

your looking for a really good reading , in excess of 200 meg.

in reply to the above post.
;-)

 

[GLENNSPARK]

Another one that doesn't know how to correctly test a U/G SWA.

A sheath test will tell you if the outer serving has been damaged. Cement won’t damage the serving, mechanical damage is always a problem.

The problem comes if the sheath test fails, you have to find the damaged section.

whats up with you ..you slaag?..lol..