Actually, I would put the bilge pump
on a separate switch--not one on the panel. As posted above, though, put an inline fuse on the positive line
running from the battery to the switch. Most bilge pumps
have three-way switches that allow you to pump
manually, or use the automatic feature, which routes your positive line
through the float switch, then to the pump
. The center position of the switch is for turning it off.
The second reason is most of today's panels have indicator lamps that will eventually drain your battery, even if the bilge pump's not running--not something you really want to do.
For a panel, look at West Marine's panels.
Rule makes an inexpensive, but rugged bilge pump switch that's available from West Marine for about $25.