If looking at cabling, you need to have the following in mind, like the voltage, current capacity, temperature rating and connectors or crimp wire size specs. All cabling needs to be SABS approved. There is a lot of different regulations for different cables. You can’t for example have the same regulations for a 3 core cable than a 4 or 5 core cable. The installation method for different cables are also not the same. The main thing is that you can’t just go and install any cable, just because it is an electrical conductor. You need to be sure what you are doing.
If you install an electrical cable, don’t install a just big enough cable to do the job, it just might go over its rating and the you only sits with a very expensive fuse.