Was at a site today that had a day tank and pump control panel for a rain collection system. The control panel inside had a conduit run to the collection tank underground with wires for the submersible pump in the tank. It also had a 1/4 in. plastic tube in the conduit for measuring the depth of the water in the tank.
Aside from conduit fill concerns is this something the NEC addresses?
Aside from conduit fill concerns is this something the NEC addresses?