BATTERY CABLE SIZE
TO BE KNOWN BEFORE ORDERING.
Two Kinds of Battery Cables ✔
Usually there are two kinds of battery cables people use often for high wattage power inverters in the market.
These cables have 3/8" ring terminals on both the battery end and the inverter end. Use for inverters with DC input terminals that have threaded posts.
These cables have ring terminals on the battery end, and stud terminals on the inverter end. Use for inverters with DC input terminals that have a tubular hole with a set screw.
Most of Pooxtra Inverter's cables sets are Standard Cables which are constructed from high quality welding cable and feature heavy duty terminals, dual wall heat shrink, and high temperature terminal protectors.
We can make custom length cables for your application. If our cable size coming with inside package is not what you need, please call 1-818-658-9690 or send email to firstname.lastname@example.org for pricing and to order.
Fig.1 Standard Cables with Ring Terminal
Fig.2 PS Cables with Stud Terminal
Choosing the Correct Wire Size for a DC Circuit ✔
Choosing the right wire size for your inverter DC battery is important, since a wire that is too small can overheat and possibly start a fire. The American Boat and Yacht Council (ABYC) publishes charts with valuable detail to help experienced boat builders and installers determine what wire size they need. Although these charts are an excellent resource, they are a bit intimidating. We distill the information on these charts to a more manageable size for installers and boat owners alike.
Quality marine wire, as specified by ABYC standards, will always be stranded rather than solid, and always tin-plated copper. In addition, the DC Wire Selection Chart shown below assumes a wire insulation rating of 105°C. A lower rating will decrease the current-carrying capacity of the wire.
Choosing the correct wire by using the chart below :
▲Locate the CURRENT IN AMPS of your appliance across the top of the chart. Most electrical products include a rating label, or you can find the amperage rating in the documentation that came with the product.
▲Find circuit LENGTH IN FEET along the left side of the chart. Note that the total length of the circuit is the round trip distance from power source (usually the battery) to the product and back.
▲Select the CIRCUIT TYPE. Allowable voltage drop is based on whether a circuit is critical or non-critical.
Critical circuits, with 3% allowable voltage drop, include :
• Panel main feeders
• Bilge blowers
• Navigation lights
Non-critical circuits, with 10% allowable voltage drop, include:
• General lighting
• Bait pumps
• General appliances
Follow down the column until you find your circuit’s LENGTH IN FEET.
▲Intersect CURRENT IN AMPS with LENGTH IN FEET to identify the wire size.
Example: A windlass rated 80A is 25’ from the battery. Circuit length is 50’, circuit type is ‘non-critical’, and correct wire size is 4 AWG.
Fig.3 DC Wire Selection Chart
*Although this process uses information from ABYC E-11 to recommend wire size and circuit protection, it may not cover all of the unique characteristics that may exist on a boat. If you have specific questions about your installation please consult an ABYC certified installer.
What Size Cable Should I Use for My Inverter?✔
The cable size depends on the distance between battery and inverter, when connecting the inverter to the battery always use an overcurrent protection device, such as a fuse or circuit breaker, and use the thickest wire available, in the shortest length practical.
Inverter Size Cable Gauge
1000 Watts #4
1500 Watts #2
2000 Watts #1/0
2500 Watts #1/0
3000 Watts #3/0
NOTE: These are general size recommendations for inverters that utilize a single cable set (one positive and one negative cable) only, and may not be correct for all inverters or applications. Cable size recommendations may vary among inverter brands and models; check the Owner's Manual for the model you purchase before you buy the wire for it.
*The cables set coming with Pooxtra inverters may not match the above recommendations.But the cable we provide is durable and practical.