Can I run 100' of UF-B 6/3 cable alongside house exterior in 1" PVC conduit? This is a run from the main breaker inside the house and outside along the restricted access side of the house in 1" S40 PVC, then back inside the house to a dedicated spa breaker sub-panel. 240v 50amp at both breakers for a Spa that draws 31 Amps. Alternatively, I would like to run four 8 AWG individual wires (blk, red, wht, grn) in the same 1" S40 PVC that can handle 9 wires of fill-rate. Is either solution OK, or is there a preference? The run along side the house is gated, cement floored and locked, extremely unlikely to be disturbed or damaged in any way.