Q. I am adding 120V AC outlets to my boat for more power outlets at the dock. Can I just go down to the local building supply store and buy any backing box for the outlet?

A. The most important thing to look for when purchasing an outlet box for your boat is the UL mark. In a 120V system you will want to look for the UL 514 mark on the outlets and the boxes. Using products with this mark eliminates the chance of an un-marked product failing and causing an unsafe situation. (BACK TO TOP)

Q. Our marina plans on re-wiring our docks. How do we do it so we meet standards?

A. NFPA 303 Fire Protection Standards for Marinas and Boatyards, covers this topic in accordance with the National Electric Code, additional coverage is included in Article 555 of the National Electric Code.. A link to information about this standard is provided on our Standards Information Resources page. (BACK TO TOP)

Q. Questions about Alternators assembled by Balmar

A. Answers to alternator questions assembled by Balmar (BACK TO TOP)

Q. Given that essential items like navigation lights and equipment must be wired to a 3% voltage drop. What about our bilge pumps? What is the voltage drop requirement for bilge pumps?"

A. In general a less than 3% voltage drop for all systems on board would be a preferable. However, when cost, weight, and wire size become issues, some sacrifices must be made to fit the build of the boat. The issue of the bilge pump however leaves us with only one choice: a 3% drop. As with most motor operated equipment on board, improper voltage can harm the performance of the unit. With this fact, bilge pumps become an "essential" item on the boat and should be factored into the 3% drop category. (BACK TO TOP)

Q. What is the CFR and in rewiring a boat how do I meet its requirements?

A. The CFR are the Code of Federal Regulations. Title 33 & some of Title 46 CFR requirements pertain to recreational boats. As far as complying with the CFR, NO WORRIES!! If you meet ABYC standards you meet or EXCEED the requirements of the CFR. (BACK TO TOP)

Q. Should the bilge pump float switch be installed in the positive or negative conductor?

A. The positive conductor. The placement of the switch takes into consideration the possibility of stray current corrosion. With two electrical components in the bilge water, it is best to minimize the number of components that carry the voltage continuously. With the switch in the positive conductor, the pump only sees the voltage when the switch is activated. This helps reduce the effects of stray current corrosion should the pump become damaged. (BACK TO TOP)

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