ECN Forum Forums General Topics of the Trade General Discussion Area Resistor for HPS lighting

useally the restior is wired in parallel with the capaitor to bleed it down in case have to do some manatice work but if you see any cap without restior at all just keep your hand away it will hold a bit of " juice "

really it should have one on it but i dont know about other lumiaires do the same thing as well but i am sure most is pretty common the capaitor is wired in series between ballast and lamp [ this is common on " 100 volts " and higer like some 150 w hps but 200 w HPS and larger will have this set up

Merci , Marc

that may be a bleed resistor. i capacitor stores a charge and even after you kill the power at the breaker you can get shocked by the capacitor (big time!). you must always discharge the capacitor before assuming it is ok to touch. the way i do it is by shorting across the terminals with a screwdriver(with the power off of coarse) usually you'll see a small spark. the recommended way of discharging a capacitor is by using a resistor across the terminals and sometimes the manufacturers install them sometimes they don't.

Most are internal now, not sure if these Caps have them or not. I've seen instructions that tell you the caps have changed and the resistors are now inside the case of the cap??