SPDT = Single Pole, Double Throw. A 2-way changeover switch directs the flow of current to one of two routes according to its position. Some SPDT switches have a central off position and are described as ‘on-off-on’.Click to see full answer. Besides, what is the symbol of switch? Electronic Switch Symbols Name Description SPST Toggle Switch Disconnects current when open SPDT Toggle Switch Selects between two connections Pushbutton Switch (N.O) Momentary switch – normally open Pushbutton Switch (N.C) Momentary switch – normally closed Additionally, what is the symbol of switch in on position? IEC 60417-5007, the power-on symbol (line), appearing on a button or one end of a toggle switch indicates that the control places the equipment into a fully powered state. IEC 60417-5008, the power-off symbol (circle) on a button or toggle, indicates that using the control will disconnect power to the device. Consequently, what is the meaning of two way switch? Two way switching means having two or more switches in different locations to control one lamp. They are wired so that operation of either switch will control the light(s).What are the electronic symbols? Basic Electrical Symbols Ground or Earth. A ground symbol (IEC symbol 5017) identifies a ground terminal. Resistor. A resistor reduces current flow. Switch. Disconnects the current when open. Capacitor. A capacitor symbol shows two terminals running into plates. Fuse. Antenna. Inductor. Transformer.