I'm beginning the process of trying to size a standby generator for my house. I will have the experts come out and offer their opinion as to what I need, but to protect myself, and because I like to learn about these things, I'm trying to do some homework upfront.
My water heater draw has me puzzled and I'm sure there's a simple explanation but I haven't been able to find it yet.
Here's the situation: I installed an electric water tank using a 2 pole 30A circuit breaker, 10 gauge 3 conductor wire. It's been running fine since November. Now that I'm trying to figure the wattage of all my appliances, I'm noticing that both the upper and lower elements are rated at 4500W. That's 9000W/240V= 37.5A .
Why aren't I tripping my circuit breaker sometimes?
For instance, when I filled the tank for the first time and had 50 gallons of cold water to heat. Could it be that both elements of a water heater are never on at the same time? In which case all I would have to account for in my generator numbers would be 4500W. But I need to understand what's really going on first.
Any of you guys know the answer to this?