current draw on small 12v winch
Submitted: Friday, Mar 31, 2006 at 00:23
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howie
i am fitting a 'supercheap' 12v winch on my trailer to pull the microlight up the ramps. the thing only weighs 180kg so thats no prob.
what i need the expected current draw of the winch, because if it is low enough, i will use it in the engel socket at the rear door. (this socket is wired direct to the aux batt with a 30a fuse and figure 8 cable, about 18 AWG).18 AWG is rated at 7A.
the winch is (and i quote from the box) a 0.45HP or 3Kw at peak.
the trusty formula P= I x V gives me 250 amps!
this would probably burn a long line in the floor carpet.
surely this can't be correct, or am i in for some re-wiring?
Reply By: bombsquad - Friday, Mar 31, 2006 at 00:32
Friday, Mar 31, 2006 at 00:32
Possibly would burn a line in the carpet, and may spread. I have considered similar for one of my boats. I decided it was too much hasstle, as most of the time I can use the 90hp on the back to get it on. Maybe a $20.00 battery pack from supercheap with jump cables will do the job with little fuss - I use one to power
camping lights and showers etc, it has lasted (to my surprise)18 months, although I have to charge it with a 4 amp charger rather than the 0.4 amp charger that comes with it!
Could be a simle solution for power with many other uses,
mine had a handy little fluro built in until I broke it.
Cheers Andrew
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Reply By: Tim HJ61 (WA) - Friday, Mar 31, 2006 at 05:51
Friday, Mar 31, 2006 at 05:51
Howie,
I'd be wondering if 18 gauge 7A wiring is adequate for the Engel, let alone a little winch. I'd be checking the voltage at the aux battery and at the Engel when it is running. Unless the cable run is quite short, I'd be expecting quite some voltage drop on load. I hate voltage drop and heat across plugs as it all equals wasted electrical energy.
I got some cool black and red cable to go with my Anderson Powerpoles which are rated at 30A and smaller and cheaper than the big
grey ones. It's either 10 or 12 guage - or in auto sparky language I think he called it 5mm. I forget what the cross sectional area measurement was, but I'm a lot more confident about the capacity of the wiring now I've run that all over the place.
BTW, I put some left over Powerpoles on ebay Site Link if you want to see them. Great little plugs.
Tim
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164017
Follow Up By: Pajman Pete (SA) - Friday, Mar 31, 2006 at 06:17
Friday, Mar 31, 2006 at 06:17
Did you have any left you want to sell?
MM me if you have.
Thanks
Pete
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