I"m rewiring a bunch the 3 means switches ago to 2 way home automation (HA) switches. This Insteon switches require a normal common (white) wire associated to the switch.I"ve pulled out all the wires, found the hot from the breaker, wired with the red in between the switches come the hot that goes to the light. Everything seems prefer it"s functioning fine, lights work and also everything. I then wired the white native an outlet from one more circuit to offer the HA switches a common. I wired every 3 HA switches to the common. The typical is obtaining voltage. I"m suspect it"s fine since lights will pass voltage with the common and also somehow it"s comming to this common. Many outlets don"t have actually voltage coming from the common right? Is this ok? will certainly this effect any type of appliance or anything?

Originally posted by justinm001
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Looking at a circuit panel all commons space blocked together. Ns can"t just take a common thats from one circuit to affix use as common on an additional circuit? I"ll definately eliminate it ASAP, just trying to recognize the logic.I used one of those voltage testers and it reads voltage similar to this one. I couldn"t discover my voltmeter yesterday.

You are watching: Why does my neutral wire have voltage

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You might possibly overload the neutral from another circuit and cause a fire. The electric code also requires the ALL conductors of a circuit be operation in the exact same cable or conduit to stop heating. Your fix need to be undone for safety and security reasons.
Understood, I"ll rewire everything correctly.Originally over there is 3 switches in the triple gang box, external 2 on one circuit and the middle on another circuit. Is this allowed also? Is it normal to have actually voltage (be may be to be shocked) ~ above the common/neutral/white wire?
Originally over there is 3 switches in the triple gang box, outer 2 top top one circuit and the middle on one more circuit. Is this enabled also?
Yes, you have the right to have many circuits in one box as long as they space not interconnected; other than for the grounds which should be interconnected.
Yes voltage on the neutral is normal, although high enough potential to be shocked is rarely it is possible. That is one of the factors that neutrals cannot be shared between different circuits. A serviceman may switch off among the two breakers to work-related on the circuit, unaware the the neutral is likewise connected through one more circuit and also be shocked through wires which where claimed to it is in dead.Also the type of tester you"re utilizing is vulnerable to false positives (reading voltage as soon as there is no actually a danger), so that is not surprising it would signal top top a neutral wire.
There shouldn"t it is in voltage on the neutral wire through respect to ground (copper). Current - yes, voltage - no. Reason it is against code to connect two neutrals from two different (in-phase) circuits is that you can overload the neutral and increase the hazard of a fire as proclaimed by pcboss (14 AWG wire deserve to only manage so lot current). The is ok, however, to attach two neutrals from two circuits just if they room on various phases.I suppose you can receive a little shock from a neutral wire if enough leakage to be to pair from the hot wire, and the ground/bare/copper to be at a various potential, yet this would be minor.
There shouldn"t it is in voltage top top the neutral wire through respect to ground (copper). Present - yes, voltage - no.
There deserve to be no current without a distinction in potential (voltage); this way that a neutral must have a non-zero voltage through respect to the system ground.V = IRThe present in the neutral wire (I) is higher than zero, and also the resistance that the neutral cable (R) is greater than zero, therefore voltage (V) should be greater than zero.Because the resistance the the copper neutral wire is usually an extremely near zero, this likewise keeps the voltage low. However, if the neutral wire is damaged or has a high impedance fault choose a corroded connection, the voltage in the neutral deserve to increase come a dangerous level at some allude out in the branch circuit.
There shouldn"t it is in voltage on the neutral wire through respect to ground (copper). Present - yes, voltage - no. Reason it is versus code to affix two neutrals from two different (in-phase) circuits is that you can overload the neutral and also increase the threat of a fire as proclaimed by pcboss (14 AWG wire deserve to only manage so lot current). The is ok, however, to affix two neutrals from 2 circuits only if they space on various phases. I suppose you can receive a small shock from a neutral cable if sufficient leakage were to couple from the warm wire, and the ground/bare/copper to be at a different potential, however this would certainly be minor.
I form it in bold and no you have the right to not do that also you will have worry with overcome netrual especally if you have actually AFCI on the will pilgrimage real quick. Merci.Marc
Yes, I recognize that V = IR. My point is the if you have something plugged in (lamp, appliance, etc.) ~ above the circuit, you can gain shocked native the neutral if friend are touching both the neutral and also ground since you are providing the current an alternative path to ground. However, current wants to follow the course of least resistance, for this reason the shock wouldn"t be that severe. And also I must correct myself concerning sharing neutrals. What I meant to to speak is that you have the right to use one neutral for two different circuits (e.g. 3-wire home run), as lengthy as the circuits room on different phases (net current = 0).
If they room MWBC mulit cable branch circuit the is no a issue however some says allready adopted brand-new codes not too long back the states that embraced 2008 NEC password cycle it must have real two pole breaker no a pair of single pole breakers. Merci.Marc
There can be no present without a distinction in potential (voltage); this way that a neutral must have actually a non-zero voltage v respect come the mechanism ground.V = IRThe current in the neutral wire (I) is higher than zero, and also the resistance that the neutral cable (R) is higher than zero, because of this voltage (V) need to be greater than zero.

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Technically this is just true for DC circuits, for AC circuits it"s just true together an average. Although that"s an excellent enough for most DIY projects.A much more important factor to not obtain hung increase on the V=IR business is that many civilization don"t understand that very little currents (and for this reason very little voltages) can be deadly. It only takes a tiny portion of an amp to avoid a person heart, if the present gets into the bloodstream somehow... Yet I store hearing world say things prefer "it"s no a many amperage/voltage" favor that make them safe. The only truly for sure amperage is no amperage.

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