Discuss In your country, do you use pipe to run wire through very much? in the UK Electrical Forum area at ElectriciansForums.net
The conduits are often much larger than what we have available here, and motorised cable pullers are common there. Don't forget their 1" conduit has a larger ID than our 1" conduit. And we certainly don't have 8" conduit here, it's hard enough finding suppliers for 32mm conduit.Cant help note the lack of pull-in boxes on some of those installations, but as said some excellent work.
Yes, 6 - 3" conduit were for the 800A, 3ph, 480 volt service, 4 - 500 MCM (almost 1,000 mils dia) plus 4/0 (21mm) ground (earth) in each. Other conduits went elsewhere. It ran under a walkway & a driveway, which were used by garbage trucks & busses. Tried to talk them into only using the rebar under, & 15' of each side of roadway...nope. And it was schedule 80 PVC too.That is some serious duct work! Still, I am surprised that the plan was to encase the lot in concrete, true it will make it tough but seems very "permanent" there.
Over here we would use SWA cable for that sort of job, probably in a runs of "twinwall" plastic duct that can be buried in soil (with sand around it, if stony soil) but in some cases just SWA direct in ground.
But 800A is a lot of current, probably that would need a few parallel runs of cable to get capacity at a sane size of cable to wrangle!
Ah, makes sense now!It ran under a walkway & a driveway, which were used by garbage trucks & busses.
Reply to In your country, do you use pipe to run wire through very much? in the UK Electrical Forum area at ElectriciansForums.net
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