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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
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In WYE 480VAC each leg to neutral is equal to how many volts?
In WYE 480 VAC each leg to neutral is equal to 277 volts. 480 / 1.73 (sq root of 3) = 277.
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.
Can a 277 unit heater be supplied with 240 volts?
Absolutely not!! 277 volts is developed from a 480 volt power supply employing 1 conductor and a neutral. 240 volt power comprises two hot conductors and NO neutral.
Where is the neutral wire on a nema 6 20r connector?
The NEMA 6-20R is a 2 pole 3 wire grounding receptacle that is rated for 250 volts. It is not meant to have a neutral wire connected to it. The receptacle is designed to have 240 volts connected to it.
What is the total of a phase to earth voltage on 11000 volts?
An 11,000 volt three-phase supply has a voltage of 6351 from live to neutral, when there is a neutral wire.
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.
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.
In WYE 480VAC each leg to neutral is equal to how many volts?
In WYE 480 VAC each leg to neutral is equal to 277 volts. 480 / 1.73 (sq root of 3) = 277.
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.
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 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.
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
Can a 277 unit heater be supplied with 240 volts?
Absolutely not!! 277 volts is developed from a 480 volt power supply employing 1 conductor and a neutral. 240 volt power comprises two hot conductors and NO neutral.
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.
Where is the neutral wire on a nema 6 20r connector?
The NEMA 6-20R is a 2 pole 3 wire grounding receptacle that is rated for 250 volts. It is not meant to have a neutral wire connected to it. The receptacle is designed to have 240 volts connected to it.
