[stevefon]

Trying to understand the connection... This is going to an outside light on telephone pole. Looks like mercury vapor or the like. There are 2 wires connected to 2 pole 30 amp breaker(220v) in the main panel. Those go to 60 am in sub panel. Another wire comes off a separate 20amp breaker that by passes the sub panel. All 3 and neutral go into conduit and up big light. Heip me understand.

Thanks

[Stratmando]

Without looking at the wiring at the light, maybe the 120 volts or the 240 volt wiring is capped off, Lights don't normally use 120 AND 240 volts, turn 1 off and see if the light still works, may need to wait until dark if controlled by a photocell.

[Jannie1]

It will help if the person tell us from which part of the world he is as in south africa we use a 220 volt system, for standerd lights on poles and posts.