for every bilge pump. I would pick up the power for the fuse for one of them from the hot side of the master switch. That way it the master switch is turned off the bilge pump will remain hot. If you need to work on the float switch or pump you can still turn it off. Also, if it gets some foreign object caught you can turn it off to clean it out. I suppose you could just eliminate the switch and go directly to the hot terminal on the master switch with the fuse but that seems a bit un-natural to an electrician. I have three electric bilge pumps. Two are switched with the master and one is not. Two have individual on /off switches that control individual bilge pump control panels. The third is a direct on / off switch. This pump is quite large and plumed with two "Y" valves. If the Y valves are aligned in one direction they pump from the sea up to the saltwater anchor wash down. If they are aligned in the other direction they pump from the bilge over the side. I also have a forth 2000 gallon per hour pump that has a 12 volt lighter plug and hose in a bag ready to go. Lastly, I have a big bronze 120 VAC pump that is my Jesus Pump. My wife heard that expression on the dock one time and asked me what the fellow was referring to when he mentioned his Jesus pump. I said, "Honey, that the pump you go for when someone yells Jesus!, get the pump!". IMHO, you can't have to many bilge pumps. We are operating in a water environment and it's always trying to sink you. Always!