Expansion Of Electric Grid Underway In Southern Indiana

(UNDATED) – An expansion of the electric grid is currently underway in southern Indiana. Through a partnership among three utilities, crews have completed about five miles of high-voltage line. The entire project is about 30 miles in length and the transmission line will cross-sections of Dubois County, Indiana; Spencer County, Indiana; and Hancock County, Kentucky. 

Recently, conductor, commonly known as a power wire, was pulled through structures spanning over I-64. Pulling conductor is a process that begins with a rope or straw line. The straw line is fed through massive pullies attached to each H-frame structure. The straw line helps guide the conductor into position. 

For this project, the conductor is pulled through six to seven miles at a time at a pulling station. Reels of wire with two miles of spooled conductor are used. As one spool of conductor ends, it needs to be attached to the next spool to meet the desired length for the pull. Dynamite is used to fuse the wires together. The connection is 200 percent stronger than a compression connection and 200 percent better for amperage.

A double bullwheel tensioner is used on this project to pull lines up to seven miles in length. This machine pulls conductor at about 25% of the tension the wire is rated at. 
Print Friendly, PDF & Email