There are two terminals in a one way light switch. When the switch is on, both terminals are connected together.Typically, these terminals will be marked COM and L1 (sometimes L1 and L2). Although, technically, it doesn’t matter which way round you connect the wires, it is best to stick to convention and connect the permanemt live (from the supply) to COM and the switched live (to the lamp) to L1.This is the most common type of switch, and is used where a light is controlled from a single switch (although you will often see a two way switch used, with one terminal left unused).
Typical Automatic Transfer Switch diagrams Technical informaTion. 2 Technical information Standard ATS Diagrams Purpose of the document The purpose of this document is to propose a technical solution based on SOCOMEC motorised changeovers and switches to answer the greatest number of standard ATS. O NQ3-AS3-32 houses 25 and 32A NOARK/CHINT. Components of an Electromechanical Starter NQ3 (order by Part No.) Max. Rated Power (kW) Part No. Rated Current (A) 660V – AC-3 Model of contactor Model of overload. Wiring Diagrams. Information subject to change without notice.