In other words, If we connect an V switch on V, the applied voltage may jump over the open contacts and overheat due to overvoltage of the circuit and connect the load to the supply voltage. It will lead to spark as well which may cause fire. The breaker will open the circuit and stop the operation if current exceed the limit due to excessive voltage as compared to the rated voltage. In short, an V and V rated switches should not be used for and V respective. For 15A and 20A circuit, use 14 and 12 gauge wire respectively.
In case of outdoor, laundry, kitchen, bathroom or watery areas, it is the code to use GFCI and ground fault interrupting receptacles for maximum protection.
Disconnect Switch Rating. According to the article and section of NEC You may use then A three poles automatic transfer switch for kW heating loads. Good to know:. A switch rated for:. A switch rated for 15A, V can be used on 20A, V circuit from the distribution board. Your email address will not be published. Notify me of follow-up comments by email. Notify me of new posts by email. Table of Contents. Use the proper size of cable and wire for electrical wiring installation.
Failure to do so can result in electrical shock, serious injury, fire or even death. Perform a continuity test for switch terminal before wiring and installation.
Triac or TRI ode AC switch is a bidirectional switching device, which is an equivalent circuit of two back to back SCRs connection with one gate terminal. Its capability to control AC power in both positive and negative peaks of the voltage waveform often makes these devices to be used in motor speed controllers, light dimmers, pressure control systems, motor drives and other AC control equipment.
A DIAC or DI ode AC Switch is bidirectional switching device and it consists of two terminals, which are not named as anode and cathode as it is a bidirectional device i. This indicates that the DIAC can be used in either direction.
When a voltage is applied across a DIAC, it either operates in forward blocking or reverse blocking mode unless the applied voltage is less than the breakover voltage. Once the voltage is increased more than breakover voltage, avalanche breakover occurs and device starts conducting. It has three terminals: an anode, a cathode and a gate. As the name implies, this switching device is capable to turn OFF through gate terminal. It can be turned OFF by a negative pulse to the gate. GTO symbol consists of double arrows on the gate terminal, which represents the bidirectional flow of current through gate terminal.
A simple tutorial on Switches, Different Types of Switches, Characteristics of a Switch, Mechanical Switches, Electronic Switches, circuit symbols of all the switches and also example circuits or connections for important switches. In my trailer, the lighting cluster contains both halogen spots and multiple LEDS.
Sir, you discuss about of most important topics, i am impressed from your magical word. Because all time you given most powerful information. Thank you so much. Respected Sir, please tell us about the working of switches and how it was connecting with wires … Mostly Students will not be terrified and make a hazard of electricity then he will give a shock then told us about how it is connect…..
Hi, even though the article is very nicely laid. The 3 position toggle switch but a very unusual switching architecture.
I would really like to see that described here as the vast majority of us do not have a clue how the internal switching works and there is almost no explanation to be found on the net and for the life of me, I just couldn. Diptrace etc etc Thank you. Your email address will not be published. General , Most Popular. What is a Switch? What are the Different Types of Switches? May 3, By Ravi Teja. Pull Rope Switches are used as emergency stop devices. Key specifications include switching function, voltage, and current ratings, as well as various features specific to e-stop applications such as broken-cable detection.
A single pull switch can be used for manual control of overhead lights and fans. As rope-pull switches, they are used for emergency stop devices, for example along the length of an in-running roll. They are sometimes called Rope Pulls or Cable Pulls. Pushbutton Switches, also referred to as Push Switches, are hand-operated electro-mechanical devices used for switches and switching circuits. They are the most common variety of switch used on industrial control panels.
Key specifications include single-throw or double-throw switching function, contact type, mounting type, actuator type, and panel cut-out diameter. The 30 mm cut-out is a common industrial size. Pushbutton switches make up the bulk of manual switches used in industrial controls. They are available in a variety of shapes and styles to cover almost any manual control scenarios. Depending on the anticipated environmental operating conditions, pushbutton switches can be equipped with protective sealing boots that are designed to prevent the intrusion of foreign matter and particles, such as sand, dirt, dust, or even liquids, that may cause reliability issues with the switch mechanisms.
Rocker Switches are hand operated electro-mechanical devices used for switching circuits. The switch operator position, raised or depressed, gives a quick visual indication of the circuit's on or off status. Key specifications include single-throw or double-throw switching function, mounting type, actuator type, and panel cut-out dimensions. Rocker switches are used for manual switching in many industrial controls as well as for control of consumer goods and office machines.
Rotary Switches are hand-operated electro-mechanical devices used for switching circuits and selecting functions. An electrical rotary switch can be two-position, on-off, or can have multiple discrete stops.
Key specifications include the number of poles, number of positions, construction type, mounting type, and panel cut-out diameter for panel mount switches. Rotary switches are used to provide a visually verifiable means of switch position, allowing operators to tell with a glance whether a circuit is energized or not. They are also called Paddle Switches. Slide Switches are hand-operated electro-mechanical devices used for switching circuits.
The switch operator is in the form of a slider that moves from position to position to control the circuit status. Key specifications include single-throw or double-throw switching function, mounting type, and panel cut-out dimensions. Slide switches are used in electrical and electronic equipment where the switching range can be limited, and economizing is important.
They are commonly used for on-off buttons or just as a general control switch. Thumbwheel Switches, also referred to as Pushwheel Switches, are hand-operated electro-mechanical devices used to control electrical circuits with a rotatable wheel. They display a numeric value corresponding to the switch position. The thumbwheel switch's working principle and key specifications include the number of positions, mounting type, actuator type, coded output type, and panel cut-out dimensions.
Thumbwheel switches are widely used in the aviation industry for flight controls, instrumentation, and controllers. They are also used in test and measurement equipment and computer devices. Toggle Switches are hand-operated electro-mechanical devices used for switching circuits. The toggle switch operation is actuated by a lever that is pushed through a small arc. Moving the lever back and forth opens and closes an electrical circuit, while the lever position gives a quick visualization of the circuit status.
Key specifications include single-throw or double-throw switching function, 1-axis, 2-axis, or 3-axis configuration, or in some cases omnidirectional or joystick toggle configuration, and actuator type. Toggle switched are used extensively in electronics panels and instrumentation where a wider range of switching function is required, such as in switchboards.
Wall Switches are hand-operated electro-mechanical devices used in residential and commercial buildings most commonly for lighting control. They are also used to control ceiling fans and electrical outlets. Key specifications include combination device function, actuator type, and additional switch functions such as dimmer control, fan speed control, or timer-based switching.
Wall switches are specifically designed to operate on line voltage and fit inside standard electrical boxes.
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