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dc insulation test = 2 * operating voltage +1000V

ac insulation test = 2* operating voltage

impedance of long wires or cables make ac testing sort of impractical

dc test will never be lower than 1000V

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Is every resistance load resistance?

No. Load resistance is the value of the element actually doing the work of the circuit it is connected to. A speaker connected to an amplifier is the load.


Is it possible to synchronise two generators with no common electrical load to be exactly out of phase?

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Related Questions

Is every resistance load resistance?

No. Load resistance is the value of the element actually doing the work of the circuit it is connected to. A speaker connected to an amplifier is the load.


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Placing a voltmeter into a circuit will raise the circuit resistance?

Usually a volt meter is placed across a component to measure the voltage drop across that component. Doing this places the volt meter resistance in parallel with that component's resistance, which will always lower the total resistance. Since the volt meter resistance is usually very large relative to the resistance of the element being measured, the total resistance does not change significantly. The formula for total resistance of two parallel elements is: Rtot = (R1*R2)/(R1+R2), as R1 (the volt meter) >> R2, Rtot ~= (R1*R2) / (R1) = R2 If a volt meter is placed into a circuit instead of around an element of that circuit, it will raise the resistance of the circuit, load the circuit with, and interrupt "normal" operation of the circuit (normal operation = how things would be without the meter in place). More importantly, the volt meter would then be measuring the voltage developped across itself (instead of an element of the circuit), which is not the point of this tool / this would be a misapplication of a volt meter.


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To wire lights and outlets on the same circuit, you can connect them to the same electrical circuit breaker. Make sure to follow local building codes and safety guidelines when doing electrical work. It is recommended to consult a licensed electrician for proper installation.


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Why does a heating element get hot when current flows?

The current is doing work against the resistance of the material which makes up the heating element.Because it has resistance.-- Whenever electric current flows through a resistance, it loses energyequal to (current-squared) x (resistance).-- When we connect components in an electrical circuit, we use wire withthe least possible resistance, so as not to lose energy in the wiring.-- When we want to warm up the lab, we use wire with significant resistance,in order to have it dissipate significant energy and radiate heat.


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Use a Mega Ohm meter, alaso known as a "Megger". Depending on the type of insulation you need to figure out what voltage to use. The test voltage can range from 500V to 5KV and you have to be sure you know what you are doing and use the right one....As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.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-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.


What should I do if I have a loose circuit breaker switch in my electrical panel?

If you have a loose circuit breaker switch in your electrical panel, it is important to turn off the power to that circuit immediately and tighten the switch securely. If you are unsure or uncomfortable doing this yourself, it is recommended to contact a licensed electrician for assistance to avoid any potential hazards or further damage.


Skeletal muscles can be strengthened by doing?

by doing resistance training with weights


When you tune a radio to a certain station you match the frequency of the internal electrical circuit to the frequency of that radio station In doing so you employing the principle of?

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What is the link between the thickness of the wire and the current needed to melt a wire?

Well, I am also doing this same question and its all about resistance. Resistance is when the electrons flow around a circuit and they collide with ions. These electrons transfer energy to the ions, which consequently get hot and move more so the resistance increases :) So the thicker the wire is, the less resistance it would have because there are more choices of pathways for the electrons can take without colliding with the ions. Therefore less resistance, more current needed to melt the wire. So the thicker the wire is, the more current is needed to melt it