How to determine sub-panel amps?
On more basic wiring question(s).. I'm trying to determine just how many separate circuits I can hang off my 100amp sub-panel. I'm wiring for the following 4 rooms;
I plan on being very liberal with the number of wall-sockets, ceiling lights, etc. which implies more circuits than would otherwise be 'needed' for a basement build-out. So, even if I max out most of the general wall socket circuits, which I understand the allowable is, 12/15amp circuit and 16/20amp circuit. Please correct me if that assumption/calculation is wrong. I'm trying to map my circuits to rooms, logical space, and load demands for my own sanity and convenience of control. With that methodology in mind my current electric map consists of the following;
- 6, 15amp circuits
- 1, 20amp circuit
- 1, 15amp for 12 can lights (6-Office and 6-Rec rooms)
- 1, 20amp circuit for Split-Mini Heat-pump
This map adds up to 145 maximum amps. Clearly too much for sub-panel to handle. Now I recognize that not all of these circuits will ever be at their maximum load. So in order for me to have the desired amount of wall sockets (and hence more circuits), and even though they all won't max out their load at the same time, how do I determine the maximum allowable 15 and 20 amp circuits my sub-panel can handle (including the feeder current requirements) and that will pass typical local code restrictions?