Been a while since I've had to figure a 3 phase load. I've got a customer that already has a 175 amp 3 phase panel installed. They're dividing their building up to put a tanning bed business in. The lights, etc. for the tanning bed side are already coming out of the existing panel. They are planning on putting (5) 3 phase tanning beds in and each one has an actual amperage of 37 amps. I'm not sure, but I think I would have to figure each one at 100% or more (continuous duty, 3 hrs or more). If I just figure 100%, that's 185 amps. They have a 75 kva transformer feeding the building. On 3 phase, how do I figure the load it can handle? Do I just divide 240 into 75,000 ? I'm thinking there is something else I'm missing.
Thanks for the help.