This is known as the common screw and its usually black instead of brass or silver. No nc and com contact terminal.
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What is com on a light switch. 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. Each symbol means a single. This is the simplest type of switch that you can get. 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. With dependent circuitry the light is activated only when the switch is on. What relation is there between no nc com contact terminals and contact structures of the contact point a b c.
Wall switches used to control ceiling light fixtures or other fixtures come in three types. 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. No terminal nc terminal and com terminal represent contact terminals symbols. If a light switch is 1 way this means it is just an onoff switch. These are often used on a stair case large.
A 2 way switch means there is another switch controlling the same light. 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. For example a long hallway or stairway might use a pair of three way. Another dead giveaway of a three way switch is the absence of on and off markings.
Gallery of What Is Com On A Light Switch
