pulling SWA through conduit.

[edexlab]

You can't always win with builders,
One job we were told "Install the cable so we know its in"

Came back cable was mangled 4"above floor level!

Lesson learned next job the instructions were;

"Those idiots can't be trusted we'll use a larger duct and pull it through later".

Returned 3 weeks later duct is rammed full of concrete at both ends, luckily the carpark hadn't been done yet and it had to be dug up , the whole duct 20m long was full of the stuff

It turned out when they poured it in the guy kept using the duct as a parking point for the nozzle as it wouldn't shut off properly and he didnt want to make a mess!

 

[Engineer54]

I would agree with you with builders in the area , but I would ensure some protection is in place for the cable and advise them about care to be taken , if the guys are that bad then maybe they would dislodge any joints on the conduit , so Pulling the cable in and protecting it is what i would do ..

I don't know about you, but i like most electricians would cement/glue any manufactured bends and joints together, not just rely on a push joint... Builders just can't be trusted to look after an installed cable over a period of weeks, no matter what temporary protection you provide at both ends....

 

[Deleted member 26818]

I wouldn't use any conduit at all.
Ducting, or lay the SWA cable direct in the concrete.

 

[PEG]

You can't always win with builders,
One job we were told "Install the cable so we know its in"

Came back cable was mangled 4"above floor level!

Lesson learned next job the instructions were;

"Those idiots can't be trusted we'll use a larger duct and pull it through later".

Returned 3 weeks later duct is rammed full of concrete at both ends, luckily the carpark hadn't been done yet and it had to be dug up , the whole duct 20m long was full of the stuff

It turned out when they poured it in the guy kept using the duct as a parking point for the nozzle as it wouldn't shut off properly and he didnt want to make a mess!

I know THAT feeling well.....i was on a piling job in Tel Aviv,Israel,years ago,and the pour was on,2 hours in,and they couldn't work out why the last 40 cubic meters of concrete had not expelled much Bentonite,from the pile...when the top 5 meters was pumped out,the damaged 40" sewer could be seen.....the 40 cubes of compo however,was site-seeing round the town...

Ironically,the same thing occurred in my local town,on a smaller scale,which required a specialist team of Irish lads,3 months to sort :icon12: