0

Is it possible to use a 12 V, 6 A car battery charger with nichrome or copper flat wire to cut 8 mm synthetic rope? If so, what spec (length, width, thickness, type) of nichrome flat wire could I use for this?

ocrdu
  • 9,195
  • 22
  • 32
  • 42
Stefano Pietroiusti
  • 3
  • 2
  • 1
    It depends on the charger. If it is a smart chager, it might detect that there is no battery. – Justme Feb 01 '23 at 06:48
  • 1
    Why flat wire ? – Bruce Abbott Feb 01 '23 at 07:20
  • For a dumb charger, sure. How much current can it supply? – winny Feb 01 '23 at 08:50
  • Thanks, it is actually a 12v 6 amp charger as in pic attached. I used it keep a boat battery charged up but would like to reuse it as a heat cutter for boat rope. I also thought a flat wire would be best suited for cutting rope. I will measure output with a multimeter and then confirm. – Stefano Pietroiusti Feb 06 '23 at 08:07

1 Answers1

0

At 12 V and 6 A, you need 2 ohm or higher. At 2 ohm, you are however putting 72 W into your wire, which is a lot so you may melt it if it's too short. Nichrome is 112 μΩcm. You need to calculate your diameter and length from that to and up with 2 ohm or higher and not melt it.

Have a look here: Can I using nichrome wire to light a candle electronicaly?

winny
  • 14,707
  • 6
  • 46
  • 66