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Why do you get a voltage reading when the switch is turned off?
Wiki User
∙ 12y ago
A: A switch is either on [ short] or off [ open ] Therefore when on there is practically no potential difference
Wiki User
∙ 13y ago
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Can you get electrocuted if the switch is off but the breaker is on?
Yes you can. The proper wiring of a switch is to bring the hot wire to the top of the switch terminal and connect the load to the bottom of the switch. When the breaker is turned off it disconnects the voltage from the top of the switch and the switch is then safe to work on. By not turning the breaker off, the voltage is present at the top of the switch which could subject you to a nasty shock if you come into contact with it.
How do you de-energize a circuit?
To de-energize a circuit, the voltage has to be cut off at the source. This is usually done with a disconnect switch which is located just before the circuit's load. Turning off the breaker on a distribution panel will de-energize the circuit it is feeding. To make sure that the voltage can not be turned back on when work is being done on the circuit, the switch or breaker must have a lock off device to prevent the circuit from being turned on, except by the person that locked the circuit off.
What is ZVS quasisquare-wave converter?
ZVS techniques are techniques that force the voltage across a switch to be zero just before it is turned on or off and to keep this voltage zero while a switching transition occurs. All MOSFETs and most IGBTs have anti-parallel diodes that are built into the body of each device that allows current to flow from source to drain in a MOSFET and from emitter to collector in an IGBT. A ZVS turn-on in MOSFETs and IGBTs is therefore done by forcing current through the body-diode of the devices just before they are turned on. This clamps the voltage across the device to a single diode drop (which is a negligible voltage) during a switching transition so that turn-on switching losses are greatly reduced. A ZVS turn-off is achieved by slowing down the rate of voltage rise across a switch when it is turned off by adding some capacitance across the switch; this limits the overlap between voltage and current during the switching transition
In our home all the lights and fans go off if the main switch is turned off?
That is exactly as it should be.
What does switch leg mean?
The term switch leg really means switched leg. It is the wire that comes off of the bottom terminal of a switch and when the switch is turned on becomes hot. This is the leg that turns the load off and on.
Feed drops to zero volts when light switch is turned on back to 120 volts when turned off feeds fluorescent lights?
voltage is measured by voltagd drops. When a switch is open/ off there is a voltage difference between one side to the other. when the switch is on there is no drop from one side of the switch to the other. That is normal operation. If switch is on, and you get a voltage reading across the switch, the switch is bad.
Can you get electrocuted if the switch is off but the breaker is on?
Yes you can. The proper wiring of a switch is to bring the hot wire to the top of the switch terminal and connect the load to the bottom of the switch. When the breaker is turned off it disconnects the voltage from the top of the switch and the switch is then safe to work on. By not turning the breaker off, the voltage is present at the top of the switch which could subject you to a nasty shock if you come into contact with it.
Why are most industrial loads placed in parallel with the source and in series with a switch?
The loads are in series with the switch so the switch can turn them on and off. The loads are in parallel with each other so they each get the same voltage when the switch is turned on. (Kirchoff's voltage law) You would not want the loads in series with each other because they would then have half the voltage and one quarter the power that you probably intended. (Assuming consistent impedance) If you had the switch in parallel, and opened(turned off) the switch, there would still be a current along the whole circuit (except that which is in series with the switch)
Why are the parking lights staying on after your 1991 Subaru Loyale is turned off?
The switch on the top of your steerin wheel is turned on instead of off The switch on the top of your steerin wheel is turned on instead of off
When a switch is turned off should the load be zero?
The load will be zero after the switch is turned off. if power is still being drawn then the switch is quite likely faulty
How do you de-energize a circuit?
To de-energize a circuit, the voltage has to be cut off at the source. This is usually done with a disconnect switch which is located just before the circuit's load. Turning off the breaker on a distribution panel will de-energize the circuit it is feeding. To make sure that the voltage can not be turned back on when work is being done on the circuit, the switch or breaker must have a lock off device to prevent the circuit from being turned on, except by the person that locked the circuit off.
All three legs of my dimmer are hot?
If the hot is connected to the supply and it is turned on and the switch is turned on and the neutral not connected this could be quite true. Connect the neutral to the supply neutral and shut the switch off. Now the only reading that you should get is the hot supply.
Is there a switch available to control power to a thermostat for 20A 240V electric baseboard heater?
There are two types of thermostats. One is a line voltage stat. This is in effect a switch and when turned to the off position the voltage is interrupted and the heater will not operate. The other type of stat is low voltage. There will be a relay in the baseboard heater that the thermostat is connected to. With this type if installation to turn the power completely off you will have to turn the breaker off that feeds the circuit.
How do you make sure power is turned off?
if the switch in the circuit is switched off, the power is turned off on the object.
When a switch in an electrical circuit is turned off what will happen?
Closing a switch in an electrical circuit will complete the circuit. The supply voltage will then be applied to that circuit, and current will flow through that circuit.
What is happening when a switch is off?
When the light switch is turned on and a light bulb is connected in the circuit a current will flow through the circuit. Likewise when the switch is opened, the current will stop flowing in the circuit.
Parking lights on your Subaru will not turn off?
The most likely answer is that the parking light switch on top of the steering column is turned on. --Ken The parking light switch is turned off,the engine is turned off,they are still flashing
