line 1 would be 1 leg of 220 and line 2 would be the other leg). Normally you would do this by hooking the line 1 to the center terminal on one side then line 2 to the center on the opposite side. Your wiring will depend on the switch layout, but if you have three terminals on each side then normally, the terminals in the center are input, and the top terminals is 1 output, then the bottom terminals is the other output (depending on the switch position). It would require a 3 position (center off) double pole, double throw switch. Re: Re: Re: Reversing switch for 220 volt motor in reply to Tom, 04-12-2001 20:20:24 A SINGLE PHASE MOTOR WILL CONTINUE TO RUN IN THE DIRECTION IT'S GOING IF REVERSED WHILE IT IS STILL TURNING. JUST REMEMBER, TO LET THE MOTOR COME TO A COMPLETS STOP BEFORE SWITCHING TO REVERSE FROM FOREWARD. Connect screw #5 to wire #8, and screw #6 to the place you removed wire #8 from. Screw #4, on the opposite side of the drum base connects to the point you removed wire #5 from. The remaining 4 screws are the X configuration switch that actually does the reversing. Call the remaining screws #3 4 5 &6 for sake of a better identifier. For sake of explanation, call these screws #1 &2. This can be confirmed with a continuity tester, on in both forward and reverse. The rest of the switch is a double pole reversing switch.Ī close look at the switch innards will usually tell you where the single pole part is. The drum switch is actually a combination of 2 switches, one is a single pole on/off switch that operates one side of the line feeding the motor. This would be real simple to explain, with a drawing. The double pole switch breaks both wires of the 240VAC at the same time to open the circuit and closes at the same time to make contact and close the circuit.Re: Reversing switch for 220 volt motor in reply to Tom, 04-12-2001 18:20:57 A third green wire is connected to the ground screw. 240VAC double pole switches require both 120VAC hot wire, which are usually a black and red wire connected to the switch. In domestic applications these circuits power clothes dryers, electric ranges, electric hot water heaters or air conditioning window units, that are on a dedicated double pole breaker in your load center. This circuit is typically used on a larger load like a motor or an appliance that requires 240VAC.Ī double pole switch is used with a 240VAC electrical supply. Occasionally the circuit may be on a double pole breaker, making the circuit 240VAC. Single pole and 3-way switches are used for low current 120VAC (Volts of Alternating Current) applications. For the third terminal, one switch is connected to the hot supply wire while the other switch is joined to the light. Two of these take traveler wires that go from one switch to the other. They are wired so either switch can work the light, regardless of the setting of the other.Ī 3-way switch is larger than a single pole switch and has three screw terminals for wiring connections, plus a ground. These are used in pairs, with one at each switching location. In some applications however, such as hallways and larger rooms, having a single switch can be inconvenient, so it might be useful to control the light from two locations, and this is the role of the 3-way switch. There's also a ground wire to protect against electrical faults. It's called a single pole switch because there are two wires connected or separated by the switch mechanism. 3-wayĪ single pole switch is used to control the light in a small closet or bathroom. It's important to pick the right type of switch for the application. Switches are used to operate lights, fans, and even large electric motors, but they're not all the same. Server racks, enclosures & airflow management.Safety, security & emergency communications.Process safety, automation, test and measurement.Medium-voltage power distribution & control systems.Low-voltage power distribution & control systems.Industrial controls, drives, automation and sensors.Backup power, UPS, surge & IT power distribution.
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