Quick question for the backwoods engineer - I haven’t been able to dig up any information on this in my last search. On the old electro-mechanical watthour meter, you could read your instantaneous demand by timing the speed of the disk rotation and plugging the time (in seconds) along with a couple of characteristics from the meter (like the watthour constant Kh) and determine your load in watts. I now have an electronic meter on the house and, as you would guess, it has no disk so I can’t time its rotation to determine load.
It’s not that important, but I am curious as to how a user might determine their instantanious demand on one of these.
Our meters have a display (LCD) that cycles between various readings, and one of them is instantaneous demand. It would depend on the model you have.
Take a look at this.
http://www.watthackers.com/wp/10-energy-saving-devices-to-put-your-house-on-a-diet/