Battery Charger cable type & size

Hello,

I need to replace an original cables which are too short from an industrial generator (Stamford PI734D1)  to batteries Cummins 12V  1400A   220Ah  (0416-0439) connected in series so 24V

Sorry but my knowledge and experience on this subject is very limited. The cables supplied by the manufacturer are AWM 3340 or 3374 150degC 600V

My question is whether H07 or Coil and Lead could possibly be used as a replacement for the original ones? What size would be sufficient for this scenario?

The batteries will be standing about 4 meters away from the generator.

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  • Are these cables to carry the engine starter current ?   If so then voltage drop under starting conditions is the main concern. In view of the extra length, I would use AT LEAST one size larger, than the original cables, two sizes larger might be better. 4M is rather long for an engine starter circuit.

    Very substantial currents are involved when starting a large diesel engine and voltage drop should be minimised by use of generous cable sizes. Tri rated pvc cables, or welding cable, or single core HOFR may be used.

  •   

    I think you are right. They need to be at least a size higher then original ones. My colleagues confirmed they used HO7 95mm2 before for similar application but end of they day I am the person to be blame of if something happens so I need to 100% Ho7 95mm2 would be good alternative to replace original AWM 3340/3374 which is probably 70mm2 equivalent.

  • ah you never mentioned four of the buggers. I'd like to increase my estimate of the cable size ;-)
    What has gone wrong with the original cable - i.e. why are you replacing it ?

  • It was little surprise for me too :) The original cables supplied by manufacturer are very short less then a meter I would say.

    The problem is that the enclosure for the generator is very narrow and we have no room to connect these batteries as close to reach alternator connectors. According to that we are forced to fit them about 4 meters away. 

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  • It was little surprise for me too :) The original cables supplied by manufacturer are very short less then a meter I would say.

    The problem is that the enclosure for the generator is very narrow and we have no room to connect these batteries as close to reach alternator connectors. According to that we are forced to fit them about 4 meters away. 

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