The single switch controls a single light or lighting circuit. Most common is the single pole switch the type used to control a light fixture from a single locationthe next most common is the three way switch which is commonly used to control a light fixture from two different locations.
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What is com on a light switch. No terminal nc terminal and com terminal represent contact terminals symbols. For example a long hallway or stairway might use a pair of three way. Wall switches used to control ceiling light fixtures or other fixtures come in three types. This is the simplest type of switch that you can get. This is known as the common screw and its usually black instead of brass or silver. A 2 way switch means there is another switch controlling the same light.
If a light switch is 1 way this means it is just an onoff switch. Another dead giveaway of a three way switch is the absence of on and off markings. No nc and com contact terminal. What relation is there between no nc com contact terminals and contact structures of the contact point a b c. The three way switch is a variation of the standard single pole switch which controls a light only from one locationa third type is the four way switch which is used in conjunction with two three way switches to control lighting from more than two locationsthis configuration may be used in open plan homes or in large kitchens or great rooms where a central bank of lighting fixtures might. These are often used on a stair case large.
With dependent circuitry the light is activated only when the switch is on. A rocker switch with independent circuitry can have a light activated on the face of the switch in both the on and off positions which allows the switch to be found easily in the dark. A three way light switch is different than a traditional single pole light switch as it contains an extra screw to connect an extra wire. Each symbol means a single.
Gallery of What Is Com On A Light Switch
