Connecting the maximum demand meter

https://www.ohiosemitronics.com/pdf/Manuals/DM2.pdf

Here is a link to connecting the DM2 Watthour Demand Meter.

It goes into some detail specific to this meter, but it should aid you in wiring your own. I would recommend having a licensed electrician install this due to its dangerous application. Or, kill all power, then have it inspected upon completion.

Good Luck.