Fused spur unit or fused connection unit, is an electrical switch with a built in fuse, designed for appliances that do not have or require a fused plug top. Fused spur units are also used for high powered electrical equipment with heavy continuous loads, so that the appliance can be isolated by a single cable from a ring main for safety and maintenance purposes. This model is 13A rated. Made from high quality premium grade material Complete with integral gasket for moisture protection Minimum mounting depth: 25mm. Compliant to BS 1363. 15 year guarantee.