This document provides specifications for various portable earthing clamps and equipment for substations. It describes 7 different clamps - the CE16/5.5/ESI-L5, CE25, CE50, CE51, CE57, and ESI-T1. For each clamp, it provides details on intended applications, dimensions for tube/conductor diameters, number of leads that can be attached, and amperage and time tested. It also includes diagrams of some clamps and specifications for earth tapes the CE57 clamp can be used with.