I have a customer who's brother is in the filming business. He has a 2000 Watt lamp that he says trips the GFCI every time he powers it up. The filming area is all GFCI protected. The best explanation I can come up is the high inrush from the cold tungsten filament must be causing an imbalance between the line/neutral enough to trip the GFCI. I suggested using a dimmer to bring the lamp up slower.Am I even on the right track?
It's a GFCI receptacle, 20 amp on a 20 amp ckt with downline receps on it's load side. The light works fine on a non GFCI 20 amp circuit. I thought at first maybe a ground/neutral fault in the fixture, then I thought about the inrush.
#45731 - 12/05/0411:15 PMRe: 2000 watt movie lamp trips GFCI
Well I know that some reactive circuits trip GFI's but if this is a total resistive circuit it should work fine. Is it a total resistive circuit? 16.6 A is high for that circuit anyway. But if its only on now and then it should be fine.
[This message has been edited by RobbieD (edited 12-05-2004).]
#45732 - 12/06/0408:08 PMRe: 2000 watt movie lamp trips GFCI
if the light MUST be GFCI protected, and there are nobody else can think of a better idea, then try using a dimmer switch on the light. make sure it has a 2000 watt capacity. with the dimmer you could bring the bulb up to full power slowly, reducing the inrush.
#45733 - 12/06/0408:35 PMRe: 2000 watt movie lamp trips GFCI
Why are GFCI receptacles being used there anyway? This a kitchen show? I'm for using GFI's where required but if you use them everywhere because you are paranoid you are going to have problems like this.