I am upgrading the electrical service to a floating boat dock in a home I purchased last year. The lake is managed by the Army Corps of Engineers and has specific regulations I'm required to follow.
Currently, 12/2 NM UF is run from the main house on a 20amp breaker to a mast at the shoreline, where it terminates at a flood light and a GFCI receptacle. Is it possible to use this existing 20amp feed to power a remote weatherproof subpanel (required by the Corps for remote shut-off) with a single 20 amp breaker inside? The sub-panel is rated for 70 amps.
From my perspective, the amperage isn't changing, and all I'm adding is a shut-off switch, therefore nothing should be wrong with this setup. Is this a correct assumption?
From this shut off panel at the shore and a locking outlet, 12/3 (black/white/green) SJOOW is run to the dock ramp, and is junctioned to 12/2 NM UF (black/white/bare), which is run through 1/2" schedule 40 conduit beneath the ramp and onto the dock.
I am a heavy duty DIYer, but want to be sure I'm not doing anything wrong with this 20amp sub-panel since this is a first for me. Thanks in advance for any advice or answers you can provide.