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You will find articles about everything from boat wiring color standards to shore power installation to wire gauge calculations and more. To find the info that you need, just use the search box.

Or, if you need more specific information about a project, we offer free boat wiring help from Kevin Hannula, one of the marine industry's most respected electrical authorities.

Battery Boxes

Attwood is the world's most well know manufacturer of battery boxesBattery boxes are used to secure the batteries on a boat against the extreme movement of the craft on water - a marine industry standard and a Coast Guard rule. While batteries may sometimes be mounted on trays, they are more often stored and held in marine electrical battery boxes, which, besides keeping the battery in place, also protects it from exposure to outside elements like moisture while also containing the corrosive acids of the battery. Battery boxes also make moving and transporting the battery safe and easy. Battery boxes normally include a box with molded handles, a lid, a strap to hold down the lid and mounting hardware. Battery boxes are available from several marine manufacturers, although the most well-known are built by Attwood Marine.

Boat Horns

The ability to audibly signal the presence of your craft on the water is a legal requirement. The most common way this is done is with a horn. Most boat horns run off of 12 VDC. The sounding mechanisms they employ are an electrical diaphragm (like a car horn), a piezo (like an emergency buzzer) or an air diaphragm with a compressor (like a truck or ship horn). AFI is the leading supplier of boat horns in marine electrical. A horn is a crucial safety feature when a sudden warning needs to be given, to signal trouble, or when underway with low visibility such as in fog. Boat horns are available from several well known suppliers, the most famous in marine being the AFI division of Marinco. As the say on their website, they are
...the leading supplier of horns to the marine industry, with over fifty years of experience in designing and manufacturing sound devices specifically for use in harsh marine environments. Stainless steel is used for all critical components such as trumpets, motor cover, diaphragms, and assembly and mounting hardware. In the case of the XLP trumpet horns, the horn is given extra protection through the complete over-molding of the internal motor cover housing. It is this extra process that provides the added protection needed to back up the five-year warranty. AFI offers a complete line of marine horn products designed to meet almost any need, including electric and air trumpet horns, compact horns, electric and air below deck horns, and a comprehensive line of drop-in horns with a wide assortment of grill options.

Bilge Pumps

An critical component on most boats, the bilge pump is a commonly used mechanical method for pumping out the water that invariably gathers in the bilge of most watercraft.

These inexpensive but often powerful pumps are expected to perform in often varying (and occasionally severe) conditions. Not only are they required to function while a boat is cutting through heavy waves, but also in the middle of the night after a rain storm when the boat is docked and the owner is gone.Attwood 1200 GPH bilge pump

The pumps come in a variety of pumping capacities, stated in gallon per hour (GPH), and are usually powered by 12V DC. The methods of wiring them for switching on can be for manual or automatic operation, and most often is for both. Manual switching typically uses a switch on the dashboard. Automatic operation involves the use of a float switch that senses the water level in the bilge. Once a level is reached that can be pumped out, the switch turns the pump on.

Bilge pumps are manufactured by several well know companies, including Attwood Marine. The Attwood Tsunami Series features innovative engineering and compact design, that delivers high output from a small package. Attwood bilge pumps are famous for using the most advanced material available, including the best quality bearings and state-of-the-art brushes, alloys and magnets.

They offer three high-efficiency pumps that move water at output capacities of 500 gph, 800 gph and 1200 gph.