Nightstalker dude : The 150A circuit breaker is essential ke? I think I need to add this
If your battery is behind and you're running a looong line to the front(which is confirmed), then you will definitely need some kind of fuse to protect from short circuit in case the long line gets severed in a crash or wear and tear due to chafing etc and cause a short circuit. Those large cables combined with the low internal resistance of our lead acid battery, will cause it to pull like more than 1000amps(in theory) if it short circuits and will produce god loads amount of heat within the battery itself and the cable probably causing the battery to explode or fireworks show at the cables causing fire in a worst case scenario.
The reason I chose a circuit breaker is because it have a lower resistance than a comparable 150amp fuse and I can easily disconnect the electrical system in case I want to do maintenance relating to the electrical system. Alot easier than removing the reinstalling the terminals.
nice build! may i know where you bought the welding cables, the battery and the circuit breaker and roughly how much the price is?
Thanks! I bought the welding cables
here, the '500A' version which as you can see in the specs provided it's 70mm^2 cross-sectional diameter which puts it at an equivalent of a 00 gauge cable which should be 67mm^2. Don't believe those amperage ratings as they are all purely marketing. If the cables are copper, the load carrying capacity is solely dependent on the cross-sectional diameter of the cable and nothing else.
Battery is from a company called 'Gama Alliance' in puchong and the battery is an MSB MS12-65 ULTRA which I see one person selling in Lelong as well, but I remember purchasing from that company slightly cheaper. These are high quality AGM VRLA cells and not your normal car battery, these are meant for deep discharge which was why i opted for the larger size to compensate slightly as deep discharge batteries have a higher internal resistance compared to your usual car batteries which is designed for high current supply for a short period of time. Crimping and terminal lugs is done by a company called 'Conway' in Klang and he charged me a decent price but he told me he don't usually offer crimping services as their core business is selling the terminal lugs and crimping tool.
Circuit breaker was bought on eBay
here. Don't get those china circuit breaker which can be bought for like rm20-50 or so as they're pretty crap, already broke one and another one i swapped to this as I was not confident in the China unit.
Hope this helps! Took me very long to source the batteries, cables, terminal lugs/crimping and circuit breaker when I was planning it last time though.