Originally Posted by justinm001
Looking at a circuit panel all commons are blocked together. I can not simply take a common thats from one circuit to connect use as widespread on one more circuit? I"ll definately rerelocate it ASAP, just trying to understand the logic.I offered among those voltage testers and also it reads voltage equivalent to this one. I couldn"t find my voltmeter yesterday.
You are watching: Why does my neutral wire have voltage
You can perhaps overfill the neutral from another circuit and also cause a fire. The electrical code also requires that ALL conductors of a circuit be run in the exact same cable or conduit to protect against heating. Your deal with have to be undone for safety factors.
Understood, I"ll rewire everything effectively.Originally tbelow is 3 switches in the triple gang box, outer 2 on one circuit and the middle on one more circuit. Is this permitted also? Is it normal to have actually voltage (be able to be shocked) on the common/neutral/white wire?
Originally there is 3 switches in the triple gang box, outer 2 on one circuit and the middle on another circuit. Is this enabled also?
Yes, you have the right to have multiple circuits in one box as lengthy as they are not interconnected; other than for the grounds which should be interlinked.
Yes voltage on the neutral is normal, although high sufficient potential to be shocked is rare it is feasible. That is just one of the reasons that neutrals cannot be mutual between various circuits. A serviceguy might switch off one of the two breakers to work on the circuit, unaware that the neutral is additionally associated through an additional circuit and also be shocked by wires which wright here intended to be dead.Also the form of tester you"re utilizing is prone to false positives (analysis voltage as soon as tbelow is not actually a danger), so it is not surpclimbing it would certainly signal on a neutral wire.
Tright here shouldn"t be voltage on the neutral wire through respect to ground (copper). Current - yes, voltage - no. Reason it is against code to attach 2 neutrals from two separate (in-phase) circuits is that you can overfill the neutral and also boost the risk of a fire as declared by pcboss (14 AWG wire can only take care of so much current). It is ok, yet, to attach 2 neutrals from 2 circuits just if they are on various phases.I expect you might obtain a small shock from a neutral wire if sufficient leakage were to couple from the hot wire, and the ground/bare/copper was at a different potential, but this would be minor.
Tright here shouldn"t be voltage on the neutral wire with respect to ground (copper). Current - yes, voltage - no.
Tbelow have the right to be no current without a distinction in potential (voltage); this implies that a neutral should have actually a non-zero voltage with respect to the device ground.V = IRThe existing in the neutral wire (I) is higher than zero, and the resistance of the neutral wire (R) is higher than zero, therefore voltage (V) need to be higher than zero.Since the resistance of the copper neutral wire is generally very near zero, this additionally keeps the voltage low. However before, if the neutral wire is damaged or has a high impedance fault choose a corroded connection, the voltage in the neutral ca boost to a dangerous level at some point out in the branch circuit.
Tright here shouldn"t be voltage on the neutral wire through respect to ground (copper). Current - yes, voltage - no. Reason it is versus code to attach 2 neutrals from two sepaprice (in-phase) circuits is that you have the right to overfill the neutral and increase the hazard of a fire as declared by pcboss (14 AWG wire have the right to just handle so much current). It is ok, yet, to affix 2 neutrals from 2 circuits only if they are on various phases. I intend you could obtain a little shock from a neutral wire if sufficient leakage were to couple from the hot wire, and the ground/bare/copper was at a various potential, yet this would certainly be minor.
I form it in bold and no you can not do that also you will have issue through crossed netrual especally if you have actually AFCI on it will certainly expedition real quick. Merci.Marc
Yes, I understand also that V = IR. My allude is that if you have actually something plugged in (lamp, appliance, and so on.) on the circuit, you deserve to acquire shocked from the neutral if you are poignant both the neutral and also ground bereason you are giving the present an alternate path to ground. However, current wants to follow the route of least resistance, so the shock wouldn"t be that severe. And I have to correct myself concerning sharing neutrals. What I expected to say is that you deserve to usage one neutral for 2 sepaprice circuits (e.g. 3-wire house run), as long as the circuits are on different phases (net current = 0).
If they are MWBC mulit wire branch circuit it is not a issue however some states allready embraced new codes not too long earlier the claims that embraced 2008 NEC code cycle it have to have actually actual 2 pole breaker not a pair of single pole breakers. Merci.Marc
Tright here can be no present without a distinction in potential (voltage); this implies 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 the resistance of the neutral wire (R) is higher than zero, therefore 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 as an average. Although that"s excellent enough for many DIY jobs.An even more vital reason to not acquire hung up on the V=IR organization is that many kind of human being don"t understand that incredibly small curleas (and also thus exceptionally small voltages) have the right to be deadly. It only takes a tiny fractivity of an amp to stop a humale heart, if the present gets into the bloodstream somehow... yet I save hearing people say points choose "it"s not many amperage/voltage" favor that made them safe. The only truly safe amperage is no amperage.
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