voltage spikes

[JdoubleU]

Thank you all for your answers and added comments. This forum is helping me lots in advancing my knowlegde as an electrician. I have A question about a lose neutral causing voltage spikes. What theory do you base your conclusion?

 

[mdshunk]

What theory do you base your conclusion?

It's hardly a theory. It's just a fundmental fact.

A picture is worth a thousand words:

 

[JdoubleU]

Thank you, That completely makes sense. I am a visual learner

 

[JdoubleU]

Lost neutral

Lost neutral

It's hardly a theory. It's just a fundmental fact.

A picture is worth a thousand words:

So if you lose a neutral in multiwire circuit on a 3 phase system the voltage would divide itself between the 3 phases.

 

[wirenut1980]

So if you lose a neutral in multiwire circuit on a 3 phase system the voltage would divide itself between the 3 phases.

A multiwire branch circuit in a 3 phase system would be 2 phases and a neutral with loads connected phase to neutral. So if you lost the neutral, then you would have a series circuit with phase to phase Voltage source, at least up to the panel where the circuit originated.

 

[480sparky]

I also have a PowerPoint Presentation that may explain it as well.