Hi , I want to insert an on/off switch for a 12v/30A power supply . (I will draw only 20-25 A)
I thought about a switch for the AC input , rather than finding a 30-40A switch , which is I assume rarer than a simple AC switch . But Im wondering about the AC switch specifications : How much current should it be rated for ? is 3A enough (here the power plugs are 220V) ? or should I go for 5A , or even higher ?
I also though about a switch (for the DC) that belongs to some cars (I mean 1970-80's cars) which had on/off switches for their lights and those switches were like 50-60A (but 12V) .
So which way is better ?
thanks in advance .