Three Phase Mystery Solved, No Neutral Required in a Balanced Load?

In this video we continue investigating three phase and solve the mystery posed in a previous video when we removed the neutral and the circuit continued working. We explain where three phase supplies come from, and investigate a three phase waveform.

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[Sergey]

OMG.Just found your channel and can't fully describe how easier its for me to understand stuff that I've been taught with City and Guilds. Absolutely brilliant, thank you!

[no_short_circuit]

Thanks Joe. 3 phase has always mystified me but with your videos I'm getting nearer understanding it all.

[greenoranges]

I have tried to understand this concept at least 10 separate times over the years. The missing piece was that the other end of the circuits were connected to each other. I now also understand Y and delta configurations. It's the simple things that other educational content skips that make it difficult for a complete newb to understand. Thank you!

[ahmedfayez]

Thank you Sir for this amazing video.

I am a junior biomedical engineer working on Xray machines. I have noticed that we are not connecting the neutral line in the generator and i was wondering why. Just watched this video and you explained it!

Appreciate it.

[tedlahm]

But we did need the neutral with two phase of usage, as well as single phase.
Very well presented video. Thank you.

[esfae]

Hello Joe, Outstanding Video. Very informative and a great training tool.

[mnkeytruble]

just found your channel and as i just started my apprenticeship in germany this is really helping filling in the gaps of the language barrier. so far one of the best explanations ive found and easily put across so thank you dude

[keitho]

Excellent video Joe. Very clear and concise explanation. No wonder I Subscribed!!

[gbelectricks]

Excellent video again joe. I watched the first one a while ago, could you not leave it so long for the next instalment!! The suspense is killing me😄👍

[neilholmes]

Did wonder about this yesterday, I'm not an electrician but wondered how a 3 phase SWA cable could get away with a neutral that wasn't 3 times the size of the lives. Read some text that explained it but no where near as well as your video. Brilliant.Thanks

[shamanking]

Hi Joe.
We have a motor that was recently rewound, full service done to it.
But when we installed it is pulling high amps in two phases only.
supply voltage = 460
motor amp rating = 283
voltage phase to ground
phase A =279
phase B = 280
phase C = 282
amps per phase
phase A= 277.0 amps
phase B = 296.0 amps
phase C = 286.0 amps
we are using a soft starter to get the motor up to speed, once the motor is at full speed a
bypass contactor is energized and from that moment On the soft starter is only waiting for the stop command
we are going across the line with the contactor.
We suspected the bypass contactor was faulty and causing the high amps, but when we inspected the contactor it was in good
condition, it worked properly.
We checked for loose connections and found none .
motor and cables Megged good.
There is not enough imbalance to cause the problem.
Any idea what could be causing this problem ???.

[midkort]

This is a great explanation. I appreciate the fact that your explanation uses the actual goings on in the circuit. This really helps me understand - as opposed to just believing - how the circuits operate. Thank you!
You just gained a subscriber.

[brightspark]

Great video as always Joe, it's really helping my understanding of 3-phase supplies. I've always found 3-phase a fascinating subject, these videos are perfect for anyone trying to understand the underlying principles behind it.

[simonabel]

Great video, keep the three phase one's come.

[leoleorelated]

Really valuable due to the work I’m currently doing, thankyou👍🏾

[LSF]

Great video, Joe. Mystery solved although it seems too simple! I guess the way to look at it is that any wave form above the axis line is a positive figure and any value below the wave form is a negative figure; add these three up and you have the value of zero?

[vanderpant]

Great vid, like all your other vids are, your ability to convey your knowledge in a simple easy to understand way is exceptional.

[Andrew-huke]

Excellent presenter and teacher - Thank you Joe 👍

[DaftSwank]

This is brilliant stuff. Thank you! I wish Joe Robinson and YouTube were around back when I was in Uni!

[PunmasterSTP]

No neutral required? More like "The amount of knowledge conveyed in these videos is wild!" Thanks for making and sharing them.