Apparatus in this class for the construction, operation and maintenance of electricity supply systems; materials and installing equipment for electricity mains including cables, wires, connections for electric lines; parts and equipment for electric power connection; earthing systems including portable cable systems for earthing; electric testing and electric measuring apparatus including apparatus for proving the status (dead, live or variants thereof) of an electricity supply system; live working tools and systems including operating sticks and insulating tools; kits in this class for operating and maintaining electric power systems; parts, fittings and accessories in this class for the abovementioned goods