Concrete Encased Electrical Duct Bank

Firmly anchor duct banks to structure walls or slabs.

Concrete encased electrical duct bank.

Provide maximum clearance of 1 5 inches from bars to edge of concrete encasement. Duct bank width. Concentration of circuits via the same route are planned or expected. Duct line a length of duct s encased in concrete and intended to stabilize protect and serve as conduit for electric or communications cables.

Install duct bank reinforcement as shown or indicated on the drawings. Concrete encased underground electrical duct banks. Concrete encased duct bank iv. The concrete contractor said that he usually spaded the concrete around the ducts.

Boxes and not concrete manholes. The concrete encased electrode must comply with the requirements of 250 52 a 3 and the hold down bolts must be connected to the concrete encased electrode by means of welding exothermic welding the usual tie wires used to secure the rebar in a footing or other approved means fig. Bld concrete encased duct bank. Additional circuits will be added routinely.

Typical concrete encased duct bank. Volume of duct bank. For concrete encased conduits use manufactured pvc spacers and mounts for support and spacing of the conduits. Page 4 of 8 underground electric distribution standards.

Load density is significant. Minimum concrete coverage on right. 554 2 ft 3 20 5 yd 3. Duct transition a change that occurs in a duct when its relative position in a conduit line or section at one terminating point is different from that at the opposite terminating point.

Do not use concrete blocks or other means to support and space conduits that are to receive concrete encasement. Minimum concrete coverage on bottom. Page 5 of 8 underground electric distribution standards. Ga064015 0004 26 05 43 13 4 underground duct banks for electrical systems 2.

Concrete encased ductbank iv. Cables installed in concrete encased pvc duct this type of system is typically used in urban areas where. 554 2 ft 3 20 5 yd 3.