You should take video of your transformer boil party, and post it up on here. Sounds like fun.
Don't worry about that, I will of course have one of my famous youtube videos on the party and get-together
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From your diagram, it looks like you have control of four 200-Amp service entrance/panels. If you want to max out without popping panel breakers, with some margin, your should be able to get close to 150 Amps per Service Entrance; that time 4 is 600 Amps * 240 Volts or 144 kW out of a 75 kW transformer. With a little help from neighbors across the street, it could be interesting. Just remember that it may take hours to really get that transformer hot, and be prepared for a self-induced power outage of unknown duration.
Have fun, but I would keep a few fire extinguishers and some water hoses handy near the transformer. Also, keep an eye on all of those electric ranges... :wink:
Just with the Sandrift running normally, 3 of the services are already heavily taxed. Until I can switch two of the electric stoves to natural gas, one of the HPWC will be limited to 40 amps (One outside the office), and the 14-50 will be locked, and only unlocked for use upon request when the HPWC on the Garage is not in use to prevent over-loading. This summer will be a bit of a Juggling Trick, but will make it work. I will monitor the loads throughout the summer. I have my clamp on amp meter, will be measuring during peak loads, extreme heat, and when it looks like many people are cooking (Electric Stoves) to judge if the HPWC on the office can be turned up. I figure, start low and watch the load. if loads peak well below and are in a safe zone, I will turn up the HPWC. The one on the Garage that this thread has been about will be the main charging location as it was last year.
Have been slowly replacing all Lights at Sandrift with CFL's, but Focus on Energy came in end of last season and replaced EVERY light with a CFL (accept the big Sodium floodlights) at no charge. Just the porch lights for each unit alone that is about 4 kWh draw saved at night! Not to mention all the lamps and lights in the rooms! Farm & Fleet has a nice CFL Flood light Dusk to Dawn fixture on sale for (and I cant believe the price) $26 right now. Equivalent of 300 watt sodium bulb but only draws about 60 watts, so a bit more saved their. It all adds up royally.
All the TV's are still CRT, cant justify spending thousands replacing TV's when they have a stock pile of 20 or 30 more (got them all for $1 each), so not going to save anything with the TV's. basically, the big loads are Air Conditioning, Electric Stoves, Microwaves and Lights. Microwaves are so intermittent wont make much a dent, AC's are more sustained, but draw isn't very high, Lights, well, as most people staying at motels do, leave the lights on all the time. Don't need to worry about heaters as Sandrift is not open during the Winter.
Oh, and another note, I was told the City inspector came through and did the yearly inspection. Saw the HPWC and started asking lots of Tesla Questions. He inspected my install and said it was better then most the professional electrical installs he's seen in the Dells
So at least I'm set in that regard