Thanks for your vote of confidence, and thanks for engaging with the other viewer. I put a link to my new "open neutral" video in the responses below if you're interested.

Thanks brother. I am thankful for God's mercy to me and may He help us both to use what He has given us for His glory.

Good question. If the two neutrals were swapped on the right side of the top diagram it could create a big problem. You would then have the lower black wire sharing a neutral with the upper black wire. The result would be that that neutral would carry the addition of the two black wires - meaning that if each was carrying 20 amps, the neutral would be carrying 40 amps. They would not cancel each other out. It would be like sharing a neutral between two wires from the same leg (bus) in a residential panel. This is why when we are working with 120/240 V single-phase panels we need to make sure that if we share neutrals, we share them between one wire from one bus and one wire from the other bus. Likewise, in other facilities where we run more than one multiwire branch circuit within the same conduit, we must identify which neutrals go with which phase conductors [see NEC 200.4(B)]. Alternately, if you tied the two neutrals together, you could entertain similar issues depending on how much current is flowing on each hot conductor... I plan, at some point, to make videos that focus on current flow with the various systems and point out these sorts of problems.

Every time you have a single phase a neutral Carry the current back so that group is counted as 2 wires

If the neutral is still connected but loose, it could create a high-resistance point in the circuit that would not only get hotter than it should, but could create voltage drop due to the high-resistance point being in series with rest of the circuit. However, if you are asking what happens if it gets disconnected, then I'll refer you to a video I just made that addresses that exact issue of an "open neutral": kzfaq.info/get/bejne/grCmrMWQvNvOips.html

Thk you very much mrs Dave

This is not something that you would actually do in a 120/240 Single-Phase system, but if the loads are equal to each other that would work. The reason it would work is that if the loads are balanced there is no current on the shared part of the neutral. However, the reasons we would not disconnect the shared neutral from the source in real life is that when we turn the second load off it would also break the circuit for the first load. Also, if we had two different ampacity loads on the two halves then the voltage drops would reflect the resistances (or impedances) on each half and you would not maintain a consistent 120 V (or whatever your system calls for) on each side. You can destroy equipment if you feed it with a voltage that is outside of its range. That is why we always want to avoid an "open neutral" condition - in order to maintain a consistent voltage between black and the neutral (L1-N) and red and the neutral (L2-N). You could apply ohm values to the loads in the (series) circuit you envision and draw out the circuit, then do a couple calculations to see what the voltage drops would look like with the same and different size loads...

@@davegordon6819 you saying that A would complete circuit through B because one side of each load will physically and electrically connected to neutral.? If in that case it’s going through both loads and they say resistive, won’t the voltage chock up?

@@stanislavbakanov2898 I believe Dave's explanation was based on the assumption you eliminated the neutral as stated in your initial query. Which would in turn create a series circuit of additive value with the 20 amp loads you referenced. And then he touched on the potential consequences should anything be less than perfect.

@@doctorgoodwrench I understand, the elimination of neutral as far as connection at the transformer but the conductor remains in circuit connecting AAbd B

@@stanislavbakanov2898 the portion of the neutral wiring remaining would only serve as a conductor in series between the loads.

Assuming a wye configuration - peak to peak Voltage across 2 phases is 2(cos(30)) of p2p-V on and single phase. So 208 on a 120 Wye. But it's still a regular sine wine. (Any addition of sine waves at the same frequency is another sine wave on that frequency.

Power goes in and out both conductors. It's a perfect sine wave at whatever voltage the two are at line to line.

Three phase is common in Europe and in it the results are similar to what in the US split phase. On the other hand in the UK style single phase broken neutral puts full 240 V to equipment cases. In split phase and three phase it can be smaller than the full mains.

hey brother, did you find the answer? I want to know as well

The system is AC, any one can be hot or neutral. but usually ground/bond is connected to one of the wire which is than identified as neutral. Let’s wait for Dave to comment further