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Does the NESC have any regulations as to how many volts can be on utilities primary neutral wire?
Wiki User
∙ 12y ago
I am trying to find out myself, having found odd harmonics coming thru the neutral wire with my breakers open...I've been trying to identify the source of a strange hum/vibration in my home.
If you mean the NEC, they have no power over electrical utilities.
Your in home neutral wire should be at ground potential so there should be 0 volts to ground.
Wiki User
∙ 12y ago
The NESC does not specifically state a limit on the voltage present on the utility primary neutral wire. However, it does provide guidelines and safety rules for proper grounding and bonding practices to ensure safety and protection of personnel and equipment. Ultimately, the voltage on the neutral wire should be maintained within safe limits as determined by electrical codes and standards.
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In WYE 480VAC each leg to neutral is equal to how many volts?
In a WYE 480VAC system, each leg to neutral voltage is approximately 277 volts.
Can you read 120 volts line to neutral even with a severed neutral?
It depends on what side of the break that you are reading from. On the neutral load side of the break there will be no reading. On the panel neutral side of the break you will get a reading.
What is the primary amps on a 25kva tranformer with input volts 480 Volts AC?
if it's single-phase, 25,000 divided by 480.
How can I get 230 volt single pole wire from my house panel?
In North America you can not obtain 230 volts from just one single pole breaker. The distribution is like this, from a one pole breaker to neutral is 120 volts. From an adjacent breaker to neutral is 120 volts. From the adjacent breaker to adjacent breaker (breakers situated beside each other) the voltage will be 230 volts.If you want to incorporate a 120 to 230 volt transformer into the circuit you can obtain 230 volts. The primary side of the transformer will be connected to the 120 volt circuit and the secondary side of the transformer will output 230 volts. The transformer must be sized to the load amperage or the load wattage of the connected 230 volt load.
How do you convert 7620 volts to 240 volts?
To convert 7620 volts to 240 volts, you would need to use a transformer. The transformer would step-down the voltage from 7620 volts to 240 volts. The ratio of the turns on the transformer primary and secondary windings determines the voltage transformation.
Do you need a neutral to install 480 volts 3 phase heater?
If the heater is rated as a 3 phase 480 volt heater then a neutral is not needed. If the voltage stated is 277 volts three phase then a neutral is needed.
In WYE 480VAC each leg to neutral is equal to how many volts?
In a WYE 480VAC system, each leg to neutral voltage is approximately 277 volts.
If we have 13 volts on earth and neutral so?
The neutral and earth are connected at the supply transformer, so 13 volts on the neutral means that you are far enough from the transformer to have a 13 volt drop on the neutral. You probably have the same drop on the live, so the total volt drop could be 26 volts, which may be excessive. It could indicate a fault somewhere.
How do you connect a 115 v circuit when only a 230 v location is available?
Usually in a 230 volt situation, there are three wires. One wire is called neutral or ground. When you hook a motor or lamp between one wire and neutral, you get 115 volts. They are designated usually as L1, L2 and neutral. Things hooked between L1 and L2 are at 230 volts. Anything between L1 and neutral or L2 and neutral are at 120 volts.
What is voltage between earth and line?
In a typical residential situation there is 220 to 240 volts between the two hot wires that are typically red and black and 110 to 120 volts between neutral and either black or red. The voltage between neutral and earth should be zero.
Can there be 600 volt single phase power?
Yes there is single phase for 600 volts. It is used for lighting. You need a transformer which gives you 600 volts plus a neutral. The voltage for the one phase to neutral is 347.
How can you find primary from secondary coil?
Primary and secondary are only terms of convenience based on the ratings and purpose of the transformer. If a transformer is labeled 120 to 240 volts, just pick a winding and apply 120 VAC. If the output is 240 volts you found the primary and secondary. If you apply 120 volts and get 60 volts out that means the side where you applied 120 VAC is the secondary.
Can you read 120 volts line to neutral even with a severed neutral?
It depends on what side of the break that you are reading from. On the neutral load side of the break there will be no reading. On the panel neutral side of the break you will get a reading.
How is 110 volts and 220 volts measured?
With a voltmeter Keep volt meter terminal on phase and neutral wire and it will show the exact volatage
What to do when there is voltage at neutral?
Quality of the earth pit needs to be checked and enhanced. Check the continuity of the earth bus/ conductor, check for improper joints in the earth bus / conductor and correct it. Earth resistance will reduce and the voltage difference between neutral and earth will also reduce. Check also for the loose or floating neutral and correct it.
Neutral shift in 3 phase systems?
Neutral shift in a three phase system can occur when service transformers on long distribution lines are connected to provide four wire star service (like 277/480V) and the common primary connection (like three 14.4 kV transformers on a 24 kV line) on the transformers is left ungrounded. Observed Neutral shift can be so severe, depending on the situation, that in the example given here 480 Volts phase to phase and 470 Volts phase to Neutral were measured. This condition is only present while the load (this was a 100 HP pump) is not in service.
How do you add a neutral wire for 220 volts?
Standard wiring for 220 volts which is also referred to as 240 volts, commonly has four wires. One is red, one is black, one is white and one is a bare copper wire. The red and black wire carry 120 volts each, the white wire in usually your neutral which hooks up to your ground along with the bare wire.
