# voltage spikes

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#### JdoubleU

##### Senior Member
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

##### Senior Member
Jakewhis said:
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

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

#### JdoubleU

##### Senior Member
Lost neutral

Lost neutral

mdshunk said:
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

##### Senior Member
Jakewhis said:
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

##### Senior Member
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