I'm connecting a large power inverter that will convert 12 volts DC to 115 volts AC. The inverter's specifications call for #2 gauge copper stranded insulated wire cables. Since I'll be connecting this to my car battery, I got the idea to use heavy duty jumper cables. I bought a nice pair that is #2 gauge and looked perfect for the job. I cut off one end and connected the wire cables directly to the inverter and the other end is already ready to connects to my battery. I tested it and it appears to work great. However, I read the small print on the jumper cables package and it said they were "brass wire" cables. The power inverter instructions specifically say to use copper cables and to not substitute aluminum because is its lower conductivity. I've read on the net that brass is poorer conductor than aluminum. I'm now concerned if I will need to replace my cables. However, I'm wondering if the print on the package might be incorrect. I question this because most jumper cables are copper wire and these cables look like copper. The wires are the color of a new penny, not the more golden color of brass. I did not measure any voltage drop, so it appears my cables are a good conductor. Also, the quality of the cables is excellent and the price was relatively high and I'd be surprised if cheaper brass wire was used instead of copper.
My power inverter will be used for emergency situations and I want it to work as well as possible. It's important to me that these cables be copper instead of brass. Is there a way I can tell for sure? BTW- I've sent an email to the distributor but have not yet received a reply. Like a lot of stuff now a days, the cables were made in China.
Thank you, Steve Smith