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Nijerya8536 · Electrical apparatus for switching or protecting electrical circuits, or for making connections to or in electrical circuits (for example, switches, relays, fuses, surge suppressors, plugs, sockets, lamp holders and other connectors, junction boxes), for a voltage not exceeding 1 000 V; connectors for optical fibres, optical-fibre bundles or cables
In addition to the apparatus described in the HS Explanatory Note to heading 8536, this heading includes:
1. distribution frames for telephone exchanges;
2. intersection or junction plates for overhead tram cables;
3. junction plates for electric motors;
4. commutators for multiple point transformers;
5. connecting parts for accumulator elements;
6. so-called inductive proximity switches, i.e., electronic switches incorporating a free-radiating induction coil for the contactless actuation (closure) of the switch when a metal object comes within the stray field of the induction coil. Such switches are used, for example, in machine tools, conveyor machinery and weighing balances instead of mechanically operated electrical terminal switches;
7. on-off switches housed alongside an intensity modulation device (dimmer) in a single housing. By means of this equipment, it is possible not only to switch mains-operated lamps on and off, but also to vary their intensity continuously;
8. so-called contact pads for connecting electrical circuits. These consist of two superposed resilient films of plastics in which are embedded, at regular intervals, a large number of electrically conductive contact points of silicone rubber. These contact pads are incorporated, for example, under the keys of telephone sets. Each time a key is pressed the appropriate contact points on the two films touch, and electrical contact is established;
9. electronic switches which operate by contactless means, using semiconductor components (for example, transistors, thyristors, integrated circuits).
However, this heading does not include:
(a) insulation and sheathing for electric lines (generally, heading 7326);
(b) control equipment for railways and other communication routes (heading 8530).