Canadian Car Audio - Canada’s #1 Car Audio Forum

To calculate the proper power and ground cable sizes, find the distance of the power cable along the top row. If your measurement comes between two measurements, use the higher one.
Next, find the total RMS power the cable must support on the left. If your measurement comes between the two measurements, use the higher one. The size listed where your two measurements meet is the recommended cable size .

* Note: These figures have been rounded off for easy reference. Ground cables should be the same size (or larger) as the power cable. ** Current Draw figures are based on RMS Power of the amplifier with a 50% efficiency rating. *** Although wire gauge sizes smaller than 10 gauge may be acceptable for the amount of current draw, we recommend using 10 gauge as the smallest wire size for any amplifier of 100 watts or more. The goal is to provide as much current to the amplifier as it could possibly need for optimal performance.
Recommended Cable Size by Power and Distance
Total RMS
Power (watts)
Distance
4 feet 8 feet 12 feet 16 feet 20 feet
100 10 gauge 10 gauge 8 gauge 8 gauge 4 gauge
200 10 gauge 8 gauge 8 gauge 4 gauge 4 gauge
400 8 gauge 8 gauge 4 gauge 4 gauge 4 gauge
600 8 gauge 4 gauge 4 gauge 4 gauge 4 gauge
800 4 gauge 4 gauge 4 gauge 2 gauge 2 gauge
1000 4 gauge 4 gauge 2 gauge 2 gauge 2 gauge
1400 4 gauge 2 gauge 2 gauge 2 gauge 2 gauge
Current Draw by Power
Total RMS
Power (watts)
Current
Amps
100       16      
200 32
400 64
600 96
800 128
1000 160
1200 172
1400 188
Power & Ground Cable Specs
Cable Size
Wire Gauge
Current Capacity
Amperage (amps)
1/0 350
2 225
4 150
8 100
10 60
12 40
14 25
16 15

 

CarLinkDir.Com
General Car Audio: General Discussion - General SQ - General SPL - Install Related
Car Audio Regions: Western Canada - Eastern Canada - Road Trips (IASCA/USACi/DB Drag Finals)
Car Audio Classifieds: Car Audio For Sale - Car Audio Want To Buy - Miscellaneous Stuff For Sale and WTB

Car Audio Picture Gallery: Car Audio Head Units - Car Audio Amplifiers - Car Audio Speakers & Subs - Car Audio Other - Car Audio Installs - Members Installs