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 and diameters they are suited for, number of leads that can be attached, and maximum currents and durations they are tested to withstand. It also includes diagrams of some clamps and specifications for earth tapes the CE57 clamp can be used with.