Graybar Electric Co., St. Louis,has expanded its full-service branch in Bismarck, N. D. to 30,000 sq. ft., almost twice the size of the previous location. “This continues our effort to support the growing number of customers in the Bakken Shale region,” said Bill Mansfield, Graybar senior V.P., sales and marketing. “The new Bismarck branch will serve the oil and gas, industrial and construction markets as well as provide support to our branches in Minot and Dickinson.”Located at 3909 Apple Creek Rd., the branch will serve the Bismarck area and will operate from 7:00 a.m. to 5:00 p.m. Monday through Friday, with after-hours emergency service available. The branch may be reached at (701) 223-2423.