I'm trying to figure out if I can split a single branch circuit into two runs. Basically, I want to add an outlet to a circuit, but it's not in a convenient place to put it in line with a single run. The wiring would look something like:
-----------
| Panel | --------
| | 12/2 | Jct | 12/2
| 20A |--------| Box |---------Outlet-------Outlet----...
| | | |
----------- --------
|
\ 12/2
-------Outlet
Will NEC allow this? Thanks!
Best Answer
Yes, that's fine, you can "tee" circuits. I just did one that looks like a tree... starting with a 3-way split right in the service panel. And two branches themselves have splits downstream.
Now let's talk about splicing. USA receptacles provide two screws or backstabs per side. That has several uses, but the most common use is an easy way to do a 3-way splice: one for the power source, one for the downstream feed to the next outlet, and of course the receptacle itself. Here's the thing: people get hung up on this, and forget this is only one of several ways to do a splice. You can use any listed method.
So with both screws full, how do you add a third wire?
What kind of splices would you use? Any listed splice. Some examples are wire nuts -- Alumiconns (they work fine on all copper wire) -- Euro type terminal blocks -- push-in (unreliable) -- snap-down splice connectors. I use wire nuts myself.