A splice couples together abutting barrier strips for a cable tray. The splice generally includes a base wall. Opposing sidewalls extend outward from opposite sides of the base wall. The opposing side walls and the base wall together define an open interior of the splice configured to receive the abutting barrier strips therein. A window may extend through the base wall to the open interior to allow the abutting barrier strips to be visible therethrough when the abutting barrier strips are received in the open interior of the splice. A grip may be on the opposing side walls to enhance gripping of the splice. At least one of the sidewalls may have a chamfered corner to enhance entry of the barrier strips into the open interior.