For all works with connection of electricity it is better to use services of professionals in the field of electricity. Not the correct connection of contacts threatens with short circuit in wiring and poses threat for your life. If you consider that you will cope with connection of the two-gang switch independently and understand electric circuits of connection of these installations, then after carrying out all works invite the electrician for verification of the scheme of connection and only after that it is possible to use the switch.
1. Two-gang switches establish if necessary to regulate intensity of lighting, for example in chandelier. Before carrying out any works with electricity it is necessary to turn off the central giving to the apartment on guard of devices in the stairwell and to check the indicator screw-driver or the device that electricity really is absent. For this purpose in turn bring the device to each wire.
2. Having made sure that electricity on wires is absent, part three wires aside from each other that when checking wires phase and electricity, zero after inclusion, there was no short circuit.
3. Having connected guard of devices, make sure where on phase wires and where zero even if you know it. At present of the indicator screw-driver or device the phase lights up, zero does not.
4. Having disconnected guard, connect phase wires to clips of the switch and well isolate everything. Zero is necessary for work in the illumination switch if its work is not provided by the producer at connection of the switch in the normal way. Stretch it and connect separately.
5. If make your switch of the built-in type, then connection of wiring, having passed wires in assembly box.
6. At connection from the chandelier two-gang switch for work in turn of different groups of bulbs connect phase wires from the switch to different group of phase of chandelier. At inclusion of different keys the different quantity of bulbs depending on the general group of connection will light up.
7. Invite the electrician who will check correctness of the scheme of connection and safety, and reliability of connections.