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Answer for USA and Canada power supply service. Electrical panel layout might explain where the two numbers come from on a single phase installation On a electrical panel boards the wiring numbers go from left to right, top to bottom. There are 2 hot legs coming into the panel. L1 and L2. Breakers on L1 are 1,2,5,6,9,10. Breakers on L2 are 3,4,7,8,11,12. This is a 12 circuit board. This configuration allows every two adjacent breakers to connect to 240 volts. Example 1 and 3, 3 and 5, 5 and 7, 7 and 9, 9 and 11. Same with the even number side. So you see that a two pole breaker connects across the two hot legs L1 and L2 no matter where it is on the panel board. Any of these breakers on a panel board to the neutral will give you 120 volts no matter if the supply leg is L1 or L2. Just remember L1 to Neutral equals 120 volts, L2 to Neutral equals 120 volts, L1 to L2 equals 240 volts. The amperage of a breaker is a limit of the amount of amperage it will allow to pass before it will trip. The wire has to be the right size for the breaker. Under sized wire will heat up if more current is applied to it that its rating will allow.

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Q: What its the difference between 110 single phase and 220 single phase?
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What is a single circuit?

is the measured voltage,generated between a line voltage and the starting point of a three phase transformer, which is the neutral point. Answer: it is an ac circuit in which the supply has a live and neutral wire, usually at one of the standard voltages 110/120v or 220/240 v. A three-phase circuit is a combination of three single-phase circuits with the phases of the voltages 120 degrees apart so that they peak in a regular sequence.


Is there any other wires colors used for grounded other than gray and white?

In industrial wiring 'three phase' green or bare copper is the norm for a ground. In home wiring 220/110 single phase, bare copper is the ground


How by looking at a socket can you tell the difference in a double or single pole?

Single or double pole is usually a switch. 110 or 220 on a plug, 110 is usually a double outlet. 220 is usually or always a single outlet. Design of the outlet will vary depending on what is plugged into it. The slots can be 1 vertical and 1 horizontal. Both slots can be at an angle. If a regular 110 cord will not plug into an outlet, good chance it is a 220


What is the purpose of OC and SC tests on single phase transformer?

Open circuit and short circuit tests are performed to determine transformer characteristics. In the case of a single phase transformer, SC tests would be performed to determine the impedance. The open circuit test will give excitation information (% excitation at specific voltages, often 90%, 100% and 110%, and no load losses).


How do you change over so you can plug a 120V RV plug into a 240V single-phase twist-lock receptacle?

Is the 220V plug 220V only or 110/220V? (The former will have 3 prongs and the former will have 4) If your case is the latter just use the ground, neutral, and one of the hots. This will give you 120V single phase. If the case is the former you can't get 110V off that plug.

Related questions

What is the difference between 110 and 20 percent?

The difference between 110% and 20% is 138.4615%


Do televisions use single-phase or 3-phase power?

Answer 1: TV's use single-phase power. Answer 2: TV's use single phase power of 220 or 110 volts ac power depending on what part of the world you live in.


Does the USA use 110 volts?

Yes, the standard single-phase electrical system in the US is 110/120 volts at 60 Hertz.


What is the difference between 110 and 25?

110 - 25 = 85.


If you are making your own device and you bring in 208 3 phase for part of your needs - how can you properly tap 110 single phase from it to operate other parts of your device?

Your incoming 208V 3 phase power supply will also need an incoming neutral of the same conductor size. Then any single pole breaker installed in the panel will have 110 volts to the neutral. That is you can run 208V 3 phase motor circuits from a three phase breakers in the panel and any number of 110V circuits from single pole breakers.


How will a 3 phase panel give you 110 volts and 220 volts?

A three phase panel will not give you 110 and 220 volts. A three phase four wire panel will, but not at these voltages. The nearest voltages will be 120 and 208 volts. The 120 volt is the wye voltage of 208 volts. 208/1.73 = 120 volts. A single phase three wire panel will give you 110 and 220 volts.


What is the difference between 42 and 420?

420 is ten times the size of 42. Their difference is 378 .


Can you add 110 from another power source to 220 to get a usable 3 phase 240?

Short answer, no. Three phase line voltage is 120 degrees apart in separation. Single phase is 180 degrees apart. To maintain the injected voltage at 90 degrees to the single phase voltage would be nearly impossible to control.


What is the purpose of the 110 V single phase breaker?

The job of a breaker is to limit the amount of current that is applied to the size of wire that is connected to the breaker.


What is a single circuit?

is the measured voltage,generated between a line voltage and the starting point of a three phase transformer, which is the neutral point. Answer: it is an ac circuit in which the supply has a live and neutral wire, usually at one of the standard voltages 110/120v or 220/240 v. A three-phase circuit is a combination of three single-phase circuits with the phases of the voltages 120 degrees apart so that they peak in a regular sequence.


How do you round a decimal to the nearest 110?

Find a multiple of 110 that is less than (or equal to) the decimal.Find the difference between this multiple and the decimal.Repeat for the next multiple of 110 (which will be 110 more than the previous multiple).Select the multiple of 110 which gives the smaller answer.


What is the greatest common factor of 99 and 110?

One way to approach this is to look at the difference between 99 and 110, which is 11. The greatest common factor of two numbers cannot be larger than the difference between the two numbers and must be a factor of the difference. Since both 99 and 110 are divisible by 11, the greatest common factor is 11.