Concrete Duct bank Six 4" pvc conduit
- Thread starter EEC
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dduffee260
Senior Member
- Location
- Texas
How hard is the ground?
quogueelectric
Senior Member
- Location
- new york
4" pvc
4" pvc
4" pvc is available in 20 ' lengths but now is a 2 man install process. Shag out the pipe along the trench at delivery to rduce wasted time walking back and forth along trench. Glue heavy and often and use a lump hammer and short 2x4 to bang each piece into place quickly. Get the backhoe operator a head start so you are not waiting on him. Excavators dig quicker. go back and put cover over pipes after the concrete then conductive foil tape over trench . The conductive tape will carry tone for a cable locator without getting close to dangerous cables. Dont forget to call for markout and watch out for underground oil tanks and lines. Immagine ditchwitching through a full 1000 gallon oil tank in a wetlands area you could be fined and sued for 3 generations.
4" pvc
4" pvc is available in 20 ' lengths but now is a 2 man install process. Shag out the pipe along the trench at delivery to rduce wasted time walking back and forth along trench. Glue heavy and often and use a lump hammer and short 2x4 to bang each piece into place quickly. Get the backhoe operator a head start so you are not waiting on him. Excavators dig quicker. go back and put cover over pipes after the concrete then conductive foil tape over trench . The conductive tape will carry tone for a cable locator without getting close to dangerous cables. Dont forget to call for markout and watch out for underground oil tanks and lines. Immagine ditchwitching through a full 1000 gallon oil tank in a wetlands area you could be fined and sued for 3 generations.
LawnGuyLandSparky
Senior Member
Use a marker to indicate the bell end is properly seated. Concrete can be dyed red. Jet line and a piece of rebar can be used to keep the install snaked as you go. If laborers are laying the pipe, tell them coupings are not a substitute for 15 degree elbows. Only an experienced local digger can accurately estimate the m/h for trenching.
quogueelectric
Senior Member
- Location
- new york
conductive tape
conductive tape
yes we sometimes use conductive tape unfortunately there are people working out there that dont understand it so they break the tape on install and dont reconnect making markout more dificult. there are still morons out there who put the markout tape right on top of the cable. Giving no warning to any one digging around the cable. Thankfully the power company more clearly illustrated what is required for marking tape on any underground installation in thier red book for electrical installations. Common sense goes a long way in this buisness.
conductive tape
yes we sometimes use conductive tape unfortunately there are people working out there that dont understand it so they break the tape on install and dont reconnect making markout more dificult. there are still morons out there who put the markout tape right on top of the cable. Giving no warning to any one digging around the cable. Thankfully the power company more clearly illustrated what is required for marking tape on any underground installation in thier red book for electrical installations. Common sense goes a long way in this buisness.
dduffee260
Senior Member
- Location
- Texas
I know what you mean. I even witnessed some guys wanting to put the ape under the pipes. Come on, common sense will tell you what is there. If you find the tape under the pipe, then it is probably too late. The there are some who insist on putting it right down on the pipe. What good it that? What I like to do is put it about a foot deep, with the pipes being about 36 inches deep.
Duct Bank
Duct Bank
Most important item of all, since it has not been mentioned.....make sure you make frequent use of aluminum tie down wire and rebar driven well into the ground in order to keep the entire contents of the duct bank from floating once you put concrete on it....this is the worse thing that can happen to you on this type of job...
Duct Bank
Most important item of all, since it has not been mentioned.....make sure you make frequent use of aluminum tie down wire and rebar driven well into the ground in order to keep the entire contents of the duct bank from floating once you put concrete on it....this is the worse thing that can happen to you on this type of job...
kingpb
Senior Member
- Location
- SE USA as far as you can go
- Occupation
- Engineer, Registered
For products, these guys are top notch:
http://www.udevices.com/
Don't forget to talk to your AHJ, regarding when he wants to look at it, maybe before the concrete goes in.
As far as cost, I would use MEANS Electrical Cost Data.
http://www.udevices.com/
Don't forget to talk to your AHJ, regarding when he wants to look at it, maybe before the concrete goes in.
As far as cost, I would use MEANS Electrical Cost Data.
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