Post by hindsightengineering on Apr 19, 2014 15:54:28 GMT -5
Hello everyone, I'm new to this site, and recently acquired a Westinghouse type OC whatthour meter, and am interested in the electrical connections to the pins behind the meter. I know this meter I rated 120v., but am unsure which terminal or terminals to connect the hot and neutral wires to, line and load.
If anyone has this information, I will greatly appreciate it.
Also if anyone knows if an original meter socket is available, that would be really appreciated.
If this looks like yours, then based on what you've told us, it's usually a FM1S meter. So the set of pins you see on the right when looking at the meter from behind is what you want to put your hot on. This is the load bearing side. The set of pins on the left is usually just a feed-through bus, so no load will register on this side. This will be your neutral.
You'll want to wire your meter base so that your entrance cable connects at the top, and your load on the bottom. If you do it the other way around, you'll see it turning backwards.
The OC detachable usually has 4 round pins in a semi circle near the bottom rear. When you turn the meter upside down, with the pins around the bottom, the hot line wire will connect to the bottom right side pin. The neutral line and load wires connect to the second right and left pins, (common), and your load wire connects to the far left pin. This order is reversed, when wiring the socket.
Good luck finding a socket. When I obtained my OB detachable, I was lucky to get the socket and sealing ring complete with the meter. Both the OB and the OC used the same socket. Go to KWMETERS collection, and look for the Westinghouse OB detachable and you will see what they look like.
Last Edit: Apr 20, 2014 8:07:24 GMT -5 by kwmeters
When you look at the rear of your meter, with the semi circle of pins around the bottom towards you, you will find a small sealing screw at about the 9:30 position. Remove this screw and slightly twist the meter in the anti clockwise direction, making sure you support the glass. The glass cover would be as hard or harder to find, than the socket. This sealing screw is between the steel rim, and a stud with a nut and washer. The stud supports the main frame of the meter, to the rear base.
I took the liberty of removing your second of the double post. Don't worry about it, as I have done the same thing in the past.
Last Edit: Apr 20, 2014 11:28:15 GMT -5 by kwmeters