 The three were connected by means of lines of Kristiania Sporveisselskab (KSS) and Kristiania Elektriske Sporvei (KES).KKS bought twenty motorized trams from Schuckert & Co. and twelve trailers, designated as Class S. It built two depots, Sagene and Rodeløkka.The company was created after a political shift whereby the municipal council decided to start operating trams.