Building of electrical installation for light (1/2)
Part 1: Power cables and installation materials
In this article I will try to give the most common multi-line and single line diagrams for managing electric lighting (lamps) with installation keys. In multi lines diagrams it is showing all wiring and junction boxes. It can be said that they are more close to the mounting schemes. Single line diagrams are used in the drawings as they are drawn standardized symbols for switches, boxes and luminaries such as the number of conductors is shown with cross lines on a line symbolizing all conductors. You have to check compliance with standards and regulation in you country. In my country lighting installations in accordance with Regulation 3/09.06.2004 run directly hidden under plaster or laid in cable ducts. Under Article 1929 of Regulation 3 to power lighting systems for general lighting it uses wires with copper conductors and a cross section less than 1 mm ². Also according to Article 1876 lighting circuits shall be sized and protected by fuses or circuit breakers for the operating current not exceeding: for industrial and public buildings – 25A for residential and other buildings where maintenance of the lighting system is not performed by a specialist – 16A;
Switches, cables, junction boxes and connectors
There is widest variety of electrical switches for lighting control. Manufacturers offer different looks formed from simple to luxurious series. Each manufacturer provides user manual for wiring them. Here they will not be considered.