20 Electrotechnical installation material of plastic, namely, clips of plastic for pipes, snap-in clamps of plastic, sliding clamps of plastic, nail clamps of plastic, multi-cable supports of plastic, cable brackets of plastic, plugs and dowels of plastic, terminal sleeves of plastic, screwed cable glands of plastic and parts therefor, in particular reductions, extensions, adapters, nuts, pressure screws, screw plugs, threaded elbow joints of plastic, sealing plugs of plastic, cable ties of plastic, cable conduits of plastic, in particular equipment conduits, cable trunking, namely, ducts of plastic for guiding cables and wires, wiring conduits, skirting board conduits, corner conduits, floor conduits, all being of plastic, and parts and fasteners therefor, of plastic; accessory mounting frames of plastic for receiving installation mounting device for data and information technology, in particular telephone, audio, video, high frequency, network, and optical fiber device; accessory mounting boxes of plastic for receiving electrical installation mounting devices, in particular plugs, sockets and other contacts being electric connections, switches, junction boxes, covers, keyboards, rocker switches; equipment tanks of plastic to be integrated in skirting boards; fittings of plastic for the aforesaid goods