9 Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, electric plug-in connectors, sockets, coupler sockets, plugs, connectors for appliances, test plugs, phase converters, underground cable barrier boxes, enclosures and casings for electrical plugs, male or female or batteries, terminal strips for connecting electrical wires or electrical appliances and as a distributor in the form of a combination unit, connecting fuse clips; weighing, measuring, signaling, checking, supervision, and teaching apparatus and instruments, namely, electrical controllers; electrotechnical connection devices, namely, electrical plugs, sockets and other electric contacts, electrical coupler sockets, electric connectors, electric connectors for appliances, electric test connectors, phase voltage transformers, contact boxes for underground cables, empty housings for electric plugs, electric sockets, electric strip terminals and electric splice fittings