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Can a 240 circuit with red black white and bare ground be changed into two separate 120 volt circuits using the same neutral white wire for both 120 volt circuits?
Wiki User
∙ 11y ago
Yes but it is not compliant with the NEC you can use a 240 volt circuit, (Ground, Hot, Hot) you would use a (either) hot wire with a ground wire and that will be a 120 volt circuit.
I strongly advise you not to do this though because a ground wire is not trully meant to carry current and it will not be approved by any inspector.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoThis can only be done using a transformer which has a centre tapped secondary windings. The transformer ratio must be 2:1.
This can be done without a transformer and all the wire you need is there. Your 120V circuits must be on separate breakers next to and vertical to each other. You cannot separate them horizontally. This allows you to share the neutral and each hot wire should measure 120v to neutral.
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Can you use 3 phase circuit as 3 separate single phase circuit?
yes we can use as a single phase circuit because at practise directly the 3-phase circuit is made by combining the three single phase circuits
Why do you convert 120v circuits to 220v circuits?
You would need to change a circuits voltage if your adding a load that requires 220 when the present circuit supplies 120. If you need to do so it's pretty simple! First purchase a double pole breaker at the proper amp rating. Next find the breaker in the panel that supplies power to the circuit you wish to change to 220. Turn off the breaker and pull it out. Find the neutral for that circuit. Then double check and make sure it's the right neutral. Then check one more time. Now take the neutral and the hot wire for that circuit and connect them to the double pole breaker. install the breaker into the panel and turn it on. If you connected the right neutral you'll have 220 on that circuit. If you didn't you'll know because you'll trip the breaker.
What size wire for neutral in a 240v 30 amp circuit?
Answer for USA, Canada and countries running a 60 Hz supply service.240 volt two wire circuits loads do not need a neutral to operate. A three wire 240 volt circuit that needs a neutral, will have a neutral the same size as the current carrying conductors. In this case a #10.
What is the need for neutral wires in circuits for electrical services?
The neutral provides a path back to the source for the electricity. In a three-phase circuit, it is mainly used to carry the unbalanced load back to the source. In theory, a perfectly-balanced three-phase circuit would not need a neutral, but this is almost impossible to achieve in actual practice.
Can you connect the ground and neutral coming out of a cooktop to the ground of a nm8 2 wire?
Yes, you may connect the ground and neutral together as long as this is a replacement in an exsisting dwelling,for new construction you must have a four wire circuit with separate neutral and grounding conductor.It was never the intention of the code to make home owners replace exsisting three wire circuits with four wire when replacing equipment. .
Can you use 3 phase circuit as 3 separate single phase circuit?
yes we can use as a single phase circuit because at practise directly the 3-phase circuit is made by combining the three single phase circuits
Can you use a GFCI on an unswitched circuit line red that uses the same neutral white for a switched circuit coming from the other phase line black in a 240v breaker panel?
Yes. You are allowed to use a neutral for one circuit from each phase of your service. For example, in a residential service, you can use the same neutral for circuits 1 and 3. In a commercial (3 phase) service, you can use a neutral for circuits 1, 3, and 5. You will experience problems if you use a neutral for two 'black' circuits or two 'red' circuits, if the circuits originate from the same phase bus bar. Also, AFCI's are sensitive to sharing neutrals, but GFCI's are not.
Why do you convert 120v circuits to 220v circuits?
You would need to change a circuits voltage if your adding a load that requires 220 when the present circuit supplies 120. If you need to do so it's pretty simple! First purchase a double pole breaker at the proper amp rating. Next find the breaker in the panel that supplies power to the circuit you wish to change to 220. Turn off the breaker and pull it out. Find the neutral for that circuit. Then double check and make sure it's the right neutral. Then check one more time. Now take the neutral and the hot wire for that circuit and connect them to the double pole breaker. install the breaker into the panel and turn it on. If you connected the right neutral you'll have 220 on that circuit. If you didn't you'll know because you'll trip the breaker.
What size wire for neutral in a 240v 30 amp circuit?
Answer for USA, Canada and countries running a 60 Hz supply service.240 volt two wire circuits loads do not need a neutral to operate. A three wire 240 volt circuit that needs a neutral, will have a neutral the same size as the current carrying conductors. In this case a #10.
What is the need for neutral wires in circuits for electrical services?
The neutral provides a path back to the source for the electricity. In a three-phase circuit, it is mainly used to carry the unbalanced load back to the source. In theory, a perfectly-balanced three-phase circuit would not need a neutral, but this is almost impossible to achieve in actual practice.
Why neutral is not required for vacuum circuit breaker?
Air-blast circuit breakers are used to disconnect high-voltage transmission or distribution circuits in the event of a fault. One circuit breaker is required for each of the three line conductors; there is not normally a neutral conductor in high-voltage three-phase transmission/distribution lines.
Can you connect the ground and neutral coming out of a cooktop to the ground of a nm8 2 wire?
Yes, you may connect the ground and neutral together as long as this is a replacement in an exsisting dwelling,for new construction you must have a four wire circuit with separate neutral and grounding conductor.It was never the intention of the code to make home owners replace exsisting three wire circuits with four wire when replacing equipment. .
240V drop black red white bare on a 50A CB installed on the main power panel you want to split ths into two separate 120V circuits using the white as neutral for both will the 50A cb function normally?
It Will To The Exception That It Will Take Over 50 Amps To Kick The Breaker. You Will Have Two Circuits Protected By A Double Pole Breaker. You Could Remove The Strap On The Breaker That Holds The Two Together Giving You 25 Amps Per Circuit. ie One Breaker For The Black Wire And One For The Red Wire. Good Luck No, you will need to remove the double-pole breaker and install a separate breaker for each circuit, preferably no more than 20 A. The neutral and bare grounding wire can serve both circuits.
What is the code ruling in the US on 3 phase branch circuits and the neutral?
A three phase system will have 3 phase branch circuits and no neutral.
What is an electric shared neutral?
An electric shared neutral is the white or negative wire that is shared between two electrical circuits on a basic single phase system. Most electrical devices use 120 volts and require a "hot" wire and a neutral wire to operate. Some larger devices use 240 volts and require two "hot" wires to operate. Two circuit breakers in an electrical panel can share one neutral wire as long as the breakers are not on the same "leg" of power. When looking at an electrical panel there are usually two "legs" of power feeding all the breakers, each leg has 120 Volts to ground, if the "legs" are combined you will have 240 Volts. A neutral wire can be shared by two circuits as long as the breakers are on separate "legs". If someone needed to add two circuits in their home, the could run what is called a 3-wire romex, It has a black wire, a red wire, a white wire and a ground wire. The white wire is the neutral for both the black and red 120 volt circuits, and the breakers for the new circuits would need to be on separate "legs" in the panel.
What circuit takes electricity in and around your home?
Most houses have several circuits each with its own circuit breaker so that the power to the whole house will not all go off at the same time. Each circuit consists of a three-wire cable, live/neutral and earth. Some countries also use split-phase circuits with four wires.
What is the procedure to connect two circuits without losing the output voltage of first circuit which is transfered to the second circuit?
I assume you are talking about 120volt electrical circuits ???? If so, just wire them in parallel. In other words, connect the black wire to line side on each circuit and the white wire to neutral on each circuit. The bare ground wire goes to ground (green) At each circuit will be 120 volts AC. Do not exceed the maximum current of the circuit breaker supplying the current (typically 15 - 20 amps)
