ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Conduit over Vinyl Siding
by Jim M - 06/16/21 08:30 PM
Updated Forum Software
by Admin - 06/15/21 10:23 AM
Broken Outlet & Dangling Light
by LoneWolf - 06/14/21 08:21 PM
How's all our Non-US folks doing?
by C-H - 06/14/21 05:42 PM
Where is Everyone?
by Bill Addiss - 06/14/21 12:37 PM
New in the Gallery:
2020 - 2021 Winter Project
2020 - 2021 Winter Project
by Bill Addiss, April 29
Garden 2021
Garden 2021
by Bill Addiss, April 26
Who's Online Now
0 members (), 7 guests, and 17 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
Joined: Mar 2004
Posts: 785
B
BigB Offline OP
Member
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?

Joined: Feb 2003
Posts: 231
R
Member
Is it a gfci breaker or receptacle? What is the rating of the breaker?

Joined: Mar 2004
Posts: 785
B
BigB Offline OP
Member
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.

Joined: Feb 2003
Posts: 231
R
Member
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).]

Joined: Jan 2004
Posts: 66
C
Member
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.

Joined: Mar 2004
Posts: 193
G
Member
Quote
16.6 A is high for that circuit anyway

Coming from the one 2000 watt lamp alone you have the 16.6 Amps, With basic ohm's law. let alone what else is on the circuit. It's probably a good chance it is overloaded.


"If common sense was common, everyone would have it"-not sure, someone here

Joined: Feb 2003
Posts: 60
S
Member
Can you not just use a GFCI class 'B' instead to prevent nuisance tripping in this case?

-Greg

Joined: Mar 2004
Posts: 785
B
BigB Offline OP
Member
"Coming from the one 2000 watt lamp alone you have the 16.6 Amps, With basic ohm's law. let alone what else is on the circuit. It's probably a good chance it is overloaded."

I thought it was a misconception that a GFCI receptacle will trip on overload. I thought it would only trip on ground fault.

I think I will ask him to let me check out the lamp, just to satisfy my curiosity.

Joined: Feb 2003
Posts: 231
R
Member
Your right GFCI receptacles do not trip on overcurrent.

Joined: Dec 2003
Posts: 886
H
Member
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.

-Hal

Page 1 of 2 1 2

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Vlado
Vlado
Croatia
Posts: 28
Joined: February 2011
Top Posters(30 Days)
Admin 14
Trumpy 10
Popular Topics(Views)
280,396 Are you busy
213,468 Re: Forum
200,382 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5