Wellington B. Sullivan, 84, a retired electrical engineer and superintendent of shops for the Potomac Electric Power Co., died of cancer Tuesday at a hospital in Gordonsville, Va.

Mr. Sullivan, who was known to his friends as "W.B.," was born in Toledo, Ohio. He graduated from Bowling Green (Ohio) State University with a degree in electrical engineering. During World War I, he worked in shipyards in Baltimore.

He joined Pepco in 1922 and remained with the company until his retirement in 1959 as superintendent of shops. He lived in Falls Church until moving to Gordonsville in 1972.

Mr. Sullivan was a 32nd degree Mason and a Shriner. He was a member of Landmark Lodge No. 127 in Brookland, Md., and a member of Almas Temple. He also was a life member of the Light Club of Washington, an organization of Pepco employes.

Survivors include his wife, Bessie B., whom he married in 1956; three children by a previous marriage, Larry A. of Silver Spring, George B., of New Carrollton, and Patricia Shirley, of Edgewater, Md.; four stepchildren, Charlie Waller, of Gordonsville, Jackie Shelton, of Fayetteville, Tenn., Joy Chasteen, of Greenville, S.C., and Donnie Peloquin, of El Paso, Tex.; 10 grandchildren and 10 stepgrandchildren, and six great-grandchildren and six step-great-grandchildren.