I'm trying to build a dummy load for some power supply testing using some very large power resistors. Basically I will wire up the resistors in parallel and connect more if I want to decrease the resistance and therefore increase the current draw.
I want something to switch on each of these resistors. I thought maybe I could just buy some cheap wall switches but the ones I find are only 15-20A rated @ 125V AC but the testing I want to do could go to as much as 35A at 5V DC. I noticed that the switches would often be rated for 10A @ 240V and 20A @ 120V. Since I'm running such low voltage and only DC, could I run much higher than 20A?