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What will a multimeter read if you put your meter leads on both sides of a standard light switch that is energized and in the on position?
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What happens when we switch plug sockets on?
With the switch in the on position the receptacle is energized. With the switch in the off position the receptacle is de-energized.
Can a switch in the off position cause electrical short circuit?
No, once the switch is turned off the circuit is de energized. A de energized circuit can not be shorted out to create a fault.
Is the neutral wire energized when the appliance is off?
No current flows in the circuit when the circuit is open, as in when the appliance is switched off. The voltage is on the "hot" side of the switch when it is in the open position but the neutral is not energized until the switch is closed.
What happens when you connect the line wire from the switch to the load wire from the wall?
This is what the purpose of a switch is. It connects the "hot" wire to the load. When this is done the load becomes energized.
What position does the switch have to be in for a circuit to work?
The switch would be open.
What happens when we switch plug sockets on?
With the switch in the on position the receptacle is energized. With the switch in the off position the receptacle is de-energized.
What does it mean to switch a line out of service or in to service?
To switch is referring to changing the position of. So the line will be de-energized when out of service. and energized while in service.
Can a switch in the off position cause electrical short circuit?
No, once the switch is turned off the circuit is de energized. A de energized circuit can not be shorted out to create a fault.
Dos and don'ts to ensure the safety of multimeter?
Do: Each time you do an ohms test using an analog multimeter, touch the two probes together and use the calibration dial to "zero it out." For a digital multimeter, touch the probes together and it automatically calibrates itself. Donot: Don't switch multimeter functions while the meter is energized.
Is the neutral wire energized when the appliance is off?
No current flows in the circuit when the circuit is open, as in when the appliance is switched off. The voltage is on the "hot" side of the switch when it is in the open position but the neutral is not energized until the switch is closed.
The rear wiper motor for your 1997 Jeep Wrangler Hardtop has three wires When you connect only two to a switch you are able to operate the wiper Why are there three wires?
The three wires are the ground wire, the hot wire that runs through the switch and is energized only when the switch is in the on position and the third wire which is energized anytime the ignition switch is on. This circuit allows the wiper arm to go to the "park" position when you turn the wiper switch off. If you turn the ignition switch off while the wiper is in operation it will stop immediately and not continue to the "park" position. When the ignition switch is turned on again, the wiper will return to "park".
What does common mean on a light switch?
On a single pole single throw there is no common terminal. On a single pole double throw it is the terminal that is common to both the top and bottom terminals. The "hot" wire is connected to the common terminal so that when the switch is in the up position that terminal becomes energized and there will be no no voltage on the bottom terminal. When the switch is in the down position the bottom terminal becomes energized and there will be no voltage on the top terminal. In relays thisis known as a C form configuration.
What does it mean if a low pressure switch is checked on a residential heat pump with an ohm meter and there is no reading?
It means that the low pressure switch is open. Check the heat pump schematic to see if it is supposed to be an open or closed switch. Schematic electrical drawings are drawn in the de energized position. This means that when there is no voltage applied to the device, this will be the position of relays and contacts.
Can you wire a standard on and off switch into an already existing circuit so that the off position completes the old circuit and the on position routes a new circuit?
A standard switch opens the circuit when in the off position, so the answer to your question is no. That said there is a way that it can be done by changing the switch to a single pole double throw switch. The "hot" will come into the switch on the common terminal. The old circuit connects to the top switch handle up terminal. The new circuit connects to the terminal in the handle down position. This setup will leave one of the circuits on all of the time. To over come this situation the switches can be installed in a double gang box. A standard on off switch will control the power to the "hot " that comes into the SPDT switch.
Assume that the function range switch is on the 20k position and the multimeter displays 1 when the test leads are across an unknown resistor What would most likely cause the meter to display 1?
the function range switch is not set on a high enough scale
Which wire will be connect at NO or NC contact?
NO stands for Normally Open and NC is Normally Closed. It references a switching application. It is the base state of the switch. So if the load is connected to the NC terminal it will usually be energized and when the switching device is activated the circuit will open and the load will be de-energized. The NO terminal would have the load de-energized until the switch was activated and then it would be energized.
What happens to the coil of wire when someone presses the switch?
If the coil is connected to a circuit and the switch is closed then, provided there is a power source, the coil will become energized.
