Wiring 2 outlets to 2 dedicated 20 amp circuits with a single 10/3 electrical wire.

Jea48

Why are you talking about a step down transformer? this is a multi branch circuit involving 2 outlets, and a double pole breaker.

Appreciate all the commentary but my God, wtf?

emergingsoul

Why are you talking about a step down transformer? this is a multi branch circuit involving 2 outlets, and a double pole breaker.

@jea48 was referring to the transformer that steps your neighborhood’s distribution lines (which are at multi kV voltage, probably at least 3 kV and more likely 6.6 kV or more) down to 120/240VAC.

@emergingsoul

I’m beginning to think you are just pulling my chain here...🤔

Where does the power that feeds your house come from?

A Utility Power Company?... Somewhere outside your House there is a step down power transformer that feeds power to the electrical service of your house...

Without a Single Phase 120/240V SPLIT PHASE power system there would be no 3 wire single phase multiwire branch circuit... Can’t have a 3 wire multiwire branch circuit without a split phase power system. The Utility Power Company’s step down power transformer’s center tapped 240V secondary winding is what creates the 120/240 split phase power system.

/ / / /

You asked Why?

Not sure why this would be happening.

emergingsoul OP

487 posts

12-21-2022 at 11:24am

jea48,

You say that, Zero amps will return on the shared neutral conductor to the source).

Not sure why this would be happening. And then from this point on in your response above I sort of lose an understanding of what you’re saying.

But I’m really trying to follow. And I think for many it would be nice to know the rationale here as well, as this is a very profound issue.

Remember This Post:

Jea48 said:   (12-21-2022 at 08:46am)

A multiwire branch circuit is basically an extension of the split phase winding of the utility power transformer.

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Most all of us are at the mercy of a 240 V system, that involves step down transformer’s,etc.

We all have a panel in our house with busbars that feed the individual circuits. And there are two legs of 120v power distribution along the bus bars alternating between the circuit breaker’s.

Now is the issue here, jea48, that the Multi branch circuit involves two legs?? Versus the same leg, which isn't allowed with a multi branch circuit.

It seems you’re being more profound by raising issues with the overall power in flow into a house. By design we all live with that.

I am focused on 2 hot wires coming from the panel to support 2 outlets and then the shared returns related to a neutral wire and a ground wire. To this point I haven’t heard any direct problems with this issue. Only in a very broad context dealing with the overall power supply into the house.

So the question becomes, dedicated versus multi branch circuit, is this a problem? To say it’s not isolated is not answering the question as to why it’s a problem. Each of the outlets receives dedicated power off the bus bar. This is a fact.

My question focused on noise which is the issue. And if there’s no noise coming from the neutral, and the ground, assuming these are connected correctly at the panel, and the panel secures the ground via a stake in the dirt, what is the problem??