I have 240 volt service to my house. I have a 50amp dual pole breaker feeding a sub panel 60 feet away. At the breaker I have 120 volts on each leg. At the end of the sixty foot run, L1 has 100 volts, L2 Has 140 volts. This is measured under no loads, just the end of the wires. I swapped the wires and the readings followed the Wire swap. I’m thinking wiring issue. Does this sound right to everyone?
Update: Thanks everyone for the info. I picked up 100' of new copper, and bypassed the neutral in the circuit, that fixed the problem. So I'll be pulling it through conduit tomorrow... possible disaster averted!