See figure b 310 5.
Electrical duct bank cost per foot.
Concrete encased underground electrical duct banks.
Trenches are used to place utilities underground install lawn sprinklers or devise a drainage system on your property.
Less than 5 spacers per 20 feet of duct.
In annex b of national electrical code there is a 15 duct bank that uses 2 000 kcm conductors.
Getting the information.
Cost tables by 25 percent to find your local cost.
Costs in the labor cost column are the result of mul.
Construction monkey calculator that provides duct bank details including spoils concrete excavation amount.
For example l2 in the craft hrs column means that we recommend a crew of two electricians.
L1 means that a crew of one electrician is recommended.
Commercial electrical work sometimes requires the bidder to submit a price per square foot bid.
Secure separators to earth and to ducts to prevent floating during.
For a basic project in zip code 47474 with 25 linear feet the cost to install a duct starts at 9 83 17 67 per linear foot.
The bidder must understand the scope of the work in some detail in order to make a realistic bid.
Since for 6 or more ducts the main thermal bottleneck you can figure 500 kcm at 168 75 amps per cable for natural cooling.
The payout per linear foot can range between 4 and 12.
Once the probable cost is known and the profit margin determined the calculation itself is simple.
To estimate costs for your project.
Less expensive projects can run as little as 400 while more expensive ones are about 1 200.
The craft hrs column shows the recommended crew and manhours per unit for installation.