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Neutral Voltage Question

Hi all,

Hoping someone can help with this, as it bothering me that I dont know this.

This is quite tricky to explain without an image. Essentially, if we have a circuit supplying one luminaire. The line conductor has a voltage of 230v from earth potential supplying the light. To complete the circuit, on the return leg a neutral is required (<50v from earth potential). Where is the point where the neutral is no longer at mains voltage, is it at the neural terminals?

Is it a case of the luminaire will "use up" the supplied mains voltage?

Any assistance is appreciated.

Thanks

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0 mapj1 over 5 years ago

be very clear with neutral -earth voltage you mean neutral to CPC voltage - clearly in PME land, that is zero at the company fuse,

or if you mean the voltage between neutral and terra-firma earth, as present on accidental electrodes like outside metal fence posts and so on - to which you may add an outside light or camera. That voltage rises steadily the further you are from the best earth electrode on the network, usually, but not always, lowest at the substation end.
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0 mapj1 over 5 years ago

be very clear with neutral -earth voltage you mean neutral to CPC voltage - clearly in PME land, that is zero at the company fuse,

or if you mean the voltage between neutral and terra-firma earth, as present on accidental electrodes like outside metal fence posts and so on - to which you may add an outside light or camera. That voltage rises steadily the further you are from the best earth electrode on the network, usually, but not always, lowest at the substation end.
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Neutral Voltage Question

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