Today I just want to touch on some definitions from the National Electrical Code concerning some different conductors that you’re going to encounter on a regular basis. These would the the Service conductors, Feeders, and Branch Circuits.
Now before we get into those, here is a cool PDF that we’ve put together for this episode. It’s just a simple diagram that you can study as a reminder of what the difference is between these three types of conductors are. Click >>>> here to download it.
Ok, First, the Branch circuit. Let’s take a look at the NEC definition:
Branch Circuit. The circuit conductors between the final over-current device protecting the circuit and the outlet(s).
Ok so what could your final over-current device be? Most likely it will be a circuit breaker of a fuse. So a branch circuit will be the circuit conductors coming from the circuit breaker to the outlet. The place where you will plug or wire something in to use. There are no more breakers or fuses in between these two places.
So what’s before the branch circuit? The feeder of course. Here’s the definition according to the NEC.
Feeder. All circuit conductors between the service equipment, the source of a separately derived system, or other power supply source and the final branch-circuit overcurrent device.
So a feeder is the conductors coming from the load side of your service entrance equipment to your final branch circuit overcurrent device, such as a panelboard, loadcenter, or safety switch, just to name a few.
Ok, so last but not least, but that actually comes first in the whole scheme of things, is the service conductors.
Service Conductors. The conductors from the service point to the service disconnecting means.
Now the service point we learn is:
Service point. The point of connection between the facilities of the serving utility and the premises wiring
So essentially we learn that the service conductors are the conductors that will come from the load side of your utility meter to the line side of your service equipment disconnecting means. (CHECK OUT EPISODE 59)
So as you finish out the week I hope you stay safe, stay happy but as always I hope you Stay Grounded.