Hur många gånger jag änn läser regel 4.2.1(se nedan) så blir jag inte helt säker på om jag förstått rätt , jag har säkrat av strömmatningen till stegen med 4 säkringar på tot 500A och då har jag ju haft 3st 50mm2 eftersom de ihop motsvarar tot 600A avsäkring , om jag nu drar dessa 3 direkt till chassiejord och jordar jordblocket på annat ställe i chassie måste jag då även här dra 3st 50mm2 till chassiet för att klara reglerna eller efter vad skall jag dimensionera den/dessa kablar 
6. Do not forget to consider the ground-wire from the battery to the vehicles chassis. Ideally
additionl ground-wire should be installed that is equal to the mm² of positive wire feeding the
car-audio-system. The sum of the fuse rate of all wires from the battery feeding the
audiosystem (except OEM-wiring-harness) can not be higher than the maximum fuse rate
according to table A allowed for the size of the ground wire. To make judging easier in the
case that the vehicles ground wire is without modification / addition, the OEM-ground wire will
be calculated with a spare of 6mm² for the car audio system = 40Amps.

6. Do not forget to consider the ground-wire from the battery to the vehicles chassis. Ideally
additionl ground-wire should be installed that is equal to the mm² of positive wire feeding the
car-audio-system. The sum of the fuse rate of all wires from the battery feeding the
audiosystem (except OEM-wiring-harness) can not be higher than the maximum fuse rate
according to table A allowed for the size of the ground wire. To make judging easier in the
case that the vehicles ground wire is without modification / addition, the OEM-ground wire will
be calculated with a spare of 6mm² for the car audio system = 40Amps.
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