Catalina 400 MKII
Join Date: Aug 2013
Location: Santa Cruz, California
Thanked 72 Times in 68 Posts
Rep Power: 7
Re: Splitting Shore Power Cable
AC being Alternating Current, I presume. If you have an Inverter/Changer, they often have a setting to isolate the inverter to the off position. At any rate, I have done what you propose. I have a splitter on the dock. One side goes to 30 Amp, which goes to the boat. The other side of the Y is a typical house style plug. I bought a 50 Amp extension cord (it was expensive) which I run into the boat so that I can run some extra heaters in the winter when we are at the dock overnight. Works fine. I don't leave it hooked up, however, when I'm off the boat.