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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 Sparkingchip over 5 years ago

Sparkingchip:

It could be assumed that there is a 36.8 volt drop just on the phase between the suppliers transformer and their fuse at the customers installation.

The problem with that sketch and the assumptions is that the current has to flow back to the transformer and there has to be some resistance; and even if that resistance is negligible there has to be a volt drop for the neutral current to flow.
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0 Sparkingchip over 5 years ago

Sparkingchip:

It could be assumed that there is a 36.8 volt drop just on the phase between the suppliers transformer and their fuse at the customers installation.

The problem with that sketch and the assumptions is that the current has to flow back to the transformer and there has to be some resistance; and even if that resistance is negligible there has to be a volt drop for the neutral current to flow.
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Neutral Voltage Question

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