I am working with the city to get the permits to build an outdoors kitchen with its own sub-panel. I decided to place it 100ft from the house. In my list[*] I have an electric tankless water heater, an induction range and a hot-tub/spa (all 240V), plus a bunch of occasional 120V devices (food processor etc) and LED lights. After some research on those loads I want to size the wiring for 150A, the great majority of which will be 240V loads.
So far my plan includes 2in sch40 PVC conduit to house the wiring in the trench. How do I calculate the (aluminum) wiring size and what cable is appropriate for buried conduit? Thank you
[*] The comments asked to provide a list of my desired loads for this load center as to validate my requirements. Keep in mind this outdoors kitchen is designed to feed parties of 40 people:
- Induction cooktop https://products.geappliances.com/appliance/gea-specs/PHP9036BMTS 50A@240VAC
- Water heater 18kW 2x40A@240VAC https://www.amazon.com/dp/B0047V0KSU The water heater might be oversized but it needs to provide hot water to two large sinks, a dishwasher and a shower next to the pool. Maybe the smaller 11kW 60A@240VAC will work but I do not want to be limited by the wiring.
- Hot-tub/SPA. I have not chosen the right model yet but one that might fit is: https://www.wayfair.com/outdoor/pdp/futura-spas-8-person-88-jet-hot-tub-with-stainless-jets-and-waterfall-futr1000.html 50A@220VAC
- permanent 120V loads: dishwasher, refrigerator, ice machine, roof mount duct fan, lighting
- a dozen of 20A outlets for occasional devices