By far the most commonly used meter in the United States is the form 2s meter. Here is a form 2s meter wiring diagram. I also want to offer some notes about the form 2s service here.
Where is the Form 2s Meter Installed
Being the most popular meter out there it comes as no surprise that the form 2s meter is installed on both residences and businesses. It comes in both regular Kwh only format and is available with a demand register as well. Regardless the meter socket for the form 2s meter is wired the same way.
The Form 2s Meter Wiring Diagram
Ok, now that we know where the form 2s meter is installed let’s take a look at the form 2s meter wiring diagram. Notice that the form 2s meter is what is known as a self-contained meter form. This means that the meter is in series with the load. So, when the meter is pulled out of the meter socket the power to the service will go off. Of course, this happens so long as there is not a bypass meter base installed.
Alright, the power comes in from the utility on the line side of the meter base which is the top side. There are two terminals that the two phase wires will attach to. These terminals connect to the jaws that hold the meter in the socket. The next thing that you notice is the neutral wire. The neutral connects to a lug that is normally but not always in the center of the meter socket. Continuing on we see the ground connection. Most meter sockets now contain terminals specifically for the ground wire. This wire is connected to a driven ground rod.
On the bottom side of the meter socket we have the load side terminals. This is where you connect the wires that go into the house and connect to the panel. Notice that you also have both phase wires and a neutral.
I also want to make note of the colors in this diagram. The colors were chosen so they show up on the diagram. Always be sure to follow local and national codes with regard to wire color codes.
The most common voltage for this type of service is 120/240. This means that if you check the voltage between the two phase wires you should get 240v. And if you check the voltage from each phase to ground or neutral you should get 120v. If you are having problems with the voltage on this service check out this post on flickering and dimming lights to help you with troubleshooting.