Abstract: A raceway box with replaceable cable and connector receptacles is provided. The raceway box allows easy replacement of various types of connectors when necessary. Further, the raceway box can provide inlet/outlet openings in various directions based on on-site requirements. The interior space of the raceway box is extendible so as to accommodate a large volume of interconnecting cables and wires. The raceway box is composed of a base unit, a plurality of inserts including cable raceway inserts and connector raceway inserts inset on the lateral sides of the raceway box, and a socket panel covering the base unit. The base unit includes a chassis having a plurality of side pieces mounted substantially upright on the edge of said chassis. These side pieces define a corresponding number of receptacles therebetween. The cable raceway insert is used to receive at least a cable into the raceway box, and the connector raceway insert is used to mount one connector therein.