Expanding its presence in Arizona, GE Supply Co., Shelton, Conn., purchased Unilec Corp., the parent company of Presco, Scottsdale, Ariz. Terms of the agreement were not disclosed.

Unilec, with seven locations, 105 employees, and approximately $29.8 million in 1997 annual sales, is the 205th-largest electrical distributor in the U.S. GE Supply is the nation's fourth-largest electrical distributor.

Before purchasing Unilec, GE Supply had branches in Phoenix and Tucson. The acquisition adds Scottsdale, Chandler, Cottonwood, Flagstaff, Lakeside and Prescott to the mix.

Norman Shaw, president of Unilec, said he is delighted with the sale of his company to GE Supply. Shaw will leave Unilec and the electrical industry following a short transition period. The Unilec management otherwise is expected to remain the same. The locations will continue to operate under the Unilec/Presco name.