I have a hot tub installed with 4-wire 50 amp service, with the GFCI 2-pole breaker at the main panel, and a simple non-fused pull disconnect switch subpanel near the hot tub.
I want to split off a 120v line with a 10 amp breaker and receptacle at the subpanel for LED lighting. Is this possible without running more wire from the main panel? Can a branch circuit be placed downline from the GFCI?
Can you come off the 50 amp feed for LED lights, yes. But what you have now is a non fusible disconnect, not a sub panel that can add another breaker for your LED lights. You can not just stick a 15 amp wire for lights under the 50 amp terminal and run your lights. (the wire would melt long before the breaker trips if there was an issue). You will need to take the 50 amp wire into a sub panel instead of the disconnect and then have 2 separate breakers for the hot tub and the lights that will be added.
It depends on your situation whether that is easier to do then running a new 15 amp line for your lights from the existing panel or even coming off another 15 amp circuit elsewhere in the house.
