Ran three #4 rhw-2 direct burial cables to a small panel w/2 slots for branch cir. I used 1 hot 1 neu. 1 ground. Separated N and grounding wires.Since only had L1 I jumped it to L2.Is there any code reference to this practice.And also just for info If you use a three phase motor starter on single phase and use all three contacts is this ok.Reason I ask is we wired a paint both it had all three phase cont. w/all contacts being used.What they did was L1 came in through to T1 then jumped back toL2 then t2 and t3 went to motors.L2 came in to L3,Thanks for any code ref #`s I`ll go read.