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No. Disconnect switch ratings represent the maximum voltage that can be properly interrupted by the switch. As the blade opens, an arc will occur across the opening blades, and the switch is designed break the arc at a particular distance, or air gap. Higher voltage can retain the arc for a longer distance, and so the arc may not be properly interrupted. At 480 volts, this can result in a dangerous electrical hazard known as "arc flash", which could result in burns or injury.
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Can you use a 30 amp disconnect switch for a 30 kva transformer?
im have a 30 kva transformer 3 phase 480v 80 amp panel 120v what size disconnect should I use
Can you install a 3-way switch on a 240V circuit and if so how is it wired?
I believe you'd have to use a standard set of three way switches and a contactor. Tie the 120 volt coil to the three way switches and the 220 volt contactor to the load.Unless your talking about a 277 volt load, then you can use 277 volt switches.Use a relayYou're probably better off trying to wire a separate 3-way switch circuit (at 110 or even 24 vAC) to control a heavy-duty relay that operates the 220-volt device.
How do you install a 240 volt light switch?
I'm guessing you want to know what a 240v switch is? If you look at a 120v single pole switch, you will see two brass screws on one side. This type of switch is designed to interrupt current flow in one conductor. A 240v switch is really a double pole switch. It has 4 screws and is capable (and required) of interrupting current flow in two conductors simultaneously. This is an NEC requirement. It allows a local means of disconnect instead of having to go back to the breaker, and a multiwire disconnect is required to disconnect all ungrounded (hot) conductors at the same time. That way one 120v leg cannot be shut off while the other is on. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS. If you do this work yourself, always turn off the power at the breaker box/fuse panel BEFORE you attempt to do any work AND always use a meter or voltage indicatorto insure the circuit is, in fact, de-energized.
Can I use a 10A 250V power cord on a tv with input 100-240V?
yes
How do you use 220-240V appliances in US?
No, you would need a transformer. Some electrical items like shavers allow the correct supply voltage to be switched to the right value - look for a little rotatable switch near where the power cord enters the equipment.
Can you use a 240V disconnect switch for a 120V AC?
Yes and you will have a spare terminal for future use
Can you use a 30 amp disconnect switch for a 30 kva transformer?
im have a 30 kva transformer 3 phase 480v 80 amp panel 120v what size disconnect should I use
Can you use a 240 volt 3 phase disconnect with 460 volt?
It's possible, but not at all economic. Usually the 240V (sure it's not 277?) has been stepped down from 480V service already. Sounds like this is a commercial application. 480 is rare in residential, but quite common in commercial. If you need 480, you'll need to get ahead of the step down transformer.AnswerYou cannot obtain a three-phase supply from a single-phase supply.
Can you use a We Mo light switch on 240v?
The conscience is no. There is a work about by using an intermediary relay coil rated at 120 volts to switch the 240 volt feeder line.
Can you install a 3-way switch on a 240V circuit and if so how is it wired?
I believe you'd have to use a standard set of three way switches and a contactor. Tie the 120 volt coil to the three way switches and the 220 volt contactor to the load.Unless your talking about a 277 volt load, then you can use 277 volt switches.Use a relayYou're probably better off trying to wire a separate 3-way switch circuit (at 110 or even 24 vAC) to control a heavy-duty relay that operates the 220-volt device.
How do you install a 240 volt light switch?
I'm guessing you want to know what a 240v switch is? If you look at a 120v single pole switch, you will see two brass screws on one side. This type of switch is designed to interrupt current flow in one conductor. A 240v switch is really a double pole switch. It has 4 screws and is capable (and required) of interrupting current flow in two conductors simultaneously. This is an NEC requirement. It allows a local means of disconnect instead of having to go back to the breaker, and a multiwire disconnect is required to disconnect all ungrounded (hot) conductors at the same time. That way one 120v leg cannot be shut off while the other is on. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS. If you do this work yourself, always turn off the power at the breaker box/fuse panel BEFORE you attempt to do any work AND always use a meter or voltage indicatorto insure the circuit is, in fact, de-energized.
What is used on a single phase induction motor to disconnect the start winding after the motor starts?
A centrifugal switch, once the motor reaches near run speed, centrifugal force causes a set of contacts to open and disconnect the start capacitors. Some larger motors use a contactor which is disconnected by the centrifugal switch.
What will result if a smart switch is disconnected at the connector?
When troubleshooting, if you disconnect a smart switch, a code will be logged immediately. Always use the system self-diagnosis to locate problems.
Can a 600V rated cable be use in 480V 3 Phase Ckt?
yes,
What type of switch should I use to switch between 2 100 hp air compressors fed off a 200 amp disconnect.?
To answer this question the voltage of the system must be stated. You may need to use a splitter after the main disconnect and then two fused disconnects for each individual motor feed.
How do I connect a single pole 220v switch to a 3 wire 220v motor using 2 hot wires plus 1 ground?
Is it a single pole switch, or a (220)240v switch? A 240v switch is a double pole switch. It has 4 screws and disconnects both hot sources simultaneously.If it's a single pole 120v/277v switch, that just means you can use it on 120v or 277v circuits. If it's not a double pole switch with 4 screws, it's not the right one. Get a 240v double pole switch for this. You can usually find these at home improvement stores.When you state that the motor is a "three wire" make sure that the phasing is correct and you are not trying to connect up a three phase motor.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energizedIF YOU ARE NOT REALLY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
How do you use a 120Vpower supply on 240V?
No, you cannot.
