I'm helping my son build a house and he wanted a whole house standby generator. I did the research and found a 14,000 watt Kohler generator and service rated transfer switch the most highly rated. It will be fueled by propane. The generator will be mounted to a concrete pad near the house. 2 underground conduits will connect the transfer switch to the generator (one for low voltage signal/control, the other for power).
I know how to do the electrical connections. My simple question is what's best practice for type of conduit above ground? The underground conduit will be stubbed off right next to the pad. I'm thinking of extending it via typical PVC and entrance ells into the generator, but wondering if flexible, rain tight conduit might be better. I wish we could have come up underneath the generator, but the Kohler install instructions literally say to drill a hole in the "dog house" cover for the power and control. There isn't room to come up under the generator.