The crimper is working by pressing down and forming an M so it's compressing it and this is why it's important that the cable has not been twisted and effectively lays flat inside the crimp. We are talking high voltages going through these cables and on some solar farms you're talking way over a thousand volts.
If you turn this crimper over there's some lettering along the side that indicates what size cable can be used. Insert the insert into the crimper, hold firmly and close slightly. Insert the cable making sure that none of the insulation goes past the tab as you only want to crimp the conductor, NOT the insulation.
The exposed conductor should be around 10 -1 2mmm at least so that when inserted into its respective insert the end goes past the tab and where it crimps down it effectively clamps the conductor completely. The male insert which goes into the female MC4 and the next step is to actually make the crimp.
Now we're going to have a look at the actual cable and in this case we're using a 6mm cable. A lot of our commercial solar projects involve very long DC runs so of course volt drop is an issue and also the current carrying capacity of the cable comes into play as well.
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