The current drawn in the conductor can be obtained using the formula. For more detail though check with the National Electrical Code as well as your own zoning laws. Make sure the battery cable connection points at the vehicle are free of any rust or corrosion.Īlso Check: How To Keep Boat Seats From Mildewing Dc Cable Size Between Connectionsįirst you will need to calculate the maximum current that could flow through the various interconnecting cables before you choose the proper cable size.Īs far as I know these values are valid as of today. Note: If the cables are universal fit, they may need to be trimmed to length and/or have the terminal ends replaced. Are Battery Cables UniversalĬompare the new battery cables to the old battery cables to ensure that both are the same design. The primary side effect of excessive electrical resistance is heat, and enough heat can start a fire. From the safety side, wire too small for the job creates excessive electrical resistance. Electrical equipment simply cannot deliver its best performance if it’s not getting enough power, and wiring too small for the task is one surefire way to ruin an otherwise neat and orderly installation and limit the capability of the equipment. This is a good question to ask for safety as well as for performance reasons. One of the common questions DIY boaters ask is what size wire they need when performing an electrical accessory installation. It’s Important To Use The Right Sized Electric Cabling For Any Project Aboard Using The Wrong One Could Create A Plethora Of Problems In a high vibration environment, such as an engine, the heavy duty lug is usually the better choice.Īlso Check: How To Pick A Prop For My Boat There are good applications for both flared and heavy duty lugs. I personally try and use the heavy duty power lugs when I can but there are some applications where their larger and thicker form factor is a poor fit. Starter lugs are flared at the end and simply marked with the wire gauge. Once again, true heavy duty power lugs will be both color coded and die stamped. Be very careful to not to confuse flared starter lugs with true heavy duty lugs. That is a two whole die size difference due to the quality and raw thickness of the lug. This is due to the smaller OD of the Flared Starter Lug as a result of the thinner walled copper used to make the lug. Youll see here that a 1/0 wire using a Flared Starter Lug takes H& H. In the last image, for Power Lugs, a 2 GA wire took H& H/pink. These are the die settings for Starter Lugs. Recommended Reading: Removing Mold Stains From Vinyl Boat Seats NOTE: With a 2 GA wire and a heavy duty power lug the H& H dies and pink color code are selected. The chart shows that you pick the lug with BLACK markings and adjust the dies to E and A. Lets look at the settings for the 1/0 Heavy Duty Power Lug that youll see crimped later in this article. To guide you on this aspect, you can refer to the battery size section of this article above. It means, the larger your boat is and the larger its electrical load it has, the larger size of power cell it needs to keep up with its demand. We mentioned earlier that size of battery you are going to purchase would have to depend on how much power your boat needs. To be able to select the right battery for your boat and your needs, you also have to make sure that you determine the right size of battery you need. I recommend getting yourself a clamp meter that measures DC current! This will help verify whats actually going through your cables! The most popular and reasonably priced clamp meter is this one Consider The Size Of The Power Cell You Are Going To Purchase
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