“Avoid sharp bending of the cable at the first pulley in overhead installations by locating the pay-off reel far enough away from the first pulley that the lead-in angle is kept relatively flat. Use adequate lubrication of the proper type to reduce friction in conduit and duct pulls.

The percent fill requirement shall not be exceeded. Table 3 (IEEE 576, 5.1) See Attachment.īending radius of cables without metallic shielding or armor: Table 4 (IEEE 576, 7.1) See Attachment.īending radius of cables with metallic armor: Table 5 (IEEE 576, 7.1) See Attachment.Įnsure adequate clearance between duct or conduit diameter and cable diameter. (IEEE 576, 4.1.1)Ĭable sidewall pressure limitation – The ratio of pulling tension out of the bend to the radius of the bend of the cable shall be limited to minimized cable damage. The maximum pulling tension for copper conductor should not exceed 0.008 times circular-mil area. When the calculated pulling tension is close to (or within 10% of) the maximum pulling tension, use tension gauge during pulling. (NFPA 70, NEC 300.18)Ĭonsult the cable manufacturer for cable maximum allowable / recommended pulling tension. The raceway systems shall be installed complete prior to installation of MV power cables. Medium Voltage Cable Installation and Commissioning (Rated 5KV through 35KV)

Concrete encased duct bank cost