Gaston
Member
i have a variac and a 100watt light bulb built in series in a short extension cord to limit the wattage to 100watts. i was builing a power supply and went to test it throught the variac and bulb. the bulb started to light up which made me glad i pulled the variac out. as i was trying to find out what was wrong i turned the variac up a little more than before and blew a breaker. that shouldn't happen should it. i thought that was the idea of the bulb