bdn2004
Electrical
- Jan 27, 2007
- 799
We have a project where we will be relocating a number of 150 Hp, 480V pump motors about 50'. The existing feeders are installed in an underground duct bank. The feeders are approximately 300' in length.
To re-feed the motors overhead will be very expensive. Adding a pullbox at the existing location or installing a manhole are also not options.
The entire area between the new and old location will be excavated prior to building a foundation for the new equipment, thus exposing the existing duct bank.
It seems a shame not to re-use the existing, but I have never heard of extending underground duct bank ..Can this be done? Any issues?
To re-feed the motors overhead will be very expensive. Adding a pullbox at the existing location or installing a manhole are also not options.
The entire area between the new and old location will be excavated prior to building a foundation for the new equipment, thus exposing the existing duct bank.
It seems a shame not to re-use the existing, but I have never heard of extending underground duct bank ..Can this be done? Any issues?