Meter socket comes with compartment for test switch. Conductor range: 14-10 AWG. Tunnel type connectors for both load and line sides. For underground service only. Meter compartment cover overlaps lower test switch compartment cover; insertion of meter securely holds upper cover in place by means of a catch. Lower test switch compartment cover securely held by upper cover and a catch at bottom. A removable mounting bridge is provided for fastening test switch. Supplied with screw type ring. Primarily used in: AB, Sask, Man, Ont, N.B, N.S, P.E.I.