I have a 100A subpanel in a shed which feed2 swimming pool equipment. The panel contains the main, a 2-pole 50A for the heater, a 2-pole 15A for the pool pump/chlorinator, and a 1-pole 15A GFI breaker for the required receptacle and pool light.

I want to add another 15A breaker to supply some lighting for the shed (in and out) as well as a couple more GFI receptacles.

When I opened the subpanel, I noticed that the pump and chlorinator wires are wire-nutted together and then connected to the breaker. Similarly the pool light is switched using a switch loop, and these connections are also wire-nutted inside the panel.

For some reason, I was under the impression that splices were not allowed within the panel, but I don't know where I got that impression.

 

Splices are ok within your panel, as long as you don't pack them in.
From the electric code:
"The conductors, including splices and taps, shall not fill the gutter to more than 75% of its area."

 

Thanks Ron. Pretty black and white.