ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

Topic Options
Rate This Topic
#50868 - 04/13/05 07:18 PM Blown lights
AdamsAtoms Offline
Member
Registered: 03/31/05
Posts: 24
Loc: Kennedale,t.x.,76060
I just insatlled 5/300W/120V outdoor quartz light bulbs for the 3rd time in 6 months. They are installed on an apartmnet complex. The bulbs that have all blown look the same. The tubes are black inside like they received alot more than 120V at one point. When I insatll the lights Im very careful not to touch the glass with my fingers. I installed a surge surpressor breaker in the panel feeding the lights the 2nd time all the lights blew, but now that they have blown again Im out of ideas.They are the only thing on a 20 amp circuit. Any help would ge greatly apreciated.
Top
Work Gear for Electricians and the Trades
#50869 - 04/13/05 07:56 PM Re: Blown lights
Jps1006 Offline
Member
Registered: 01/22/04
Posts: 615
Loc: Northern IL
Are they on a multiwire branch circuit with a loose nuetral? Check the panel nut., all the individual nuetrals.
Top
#50870 - 04/14/05 03:50 AM Re: Blown lights
Dnkldorf Offline
Member
Registered: 12/12/04
Posts: 1064
Loc: nowhere usa
I don't know if moisture would cause the "black marks" that you described, but would lead to premature bulb failure if they got wet. Check the gaskets around the lights, if all else fails to provide an answer.


Dnk...
Top
#50871 - 04/14/05 09:42 AM Re: Blown lights
Bill39 Offline
Member
Registered: 11/28/01
Posts: 75
Loc: Indianapolis, IN, USA
I had the same problem on mine and found a bad solder connection on one of the "posts" that comes into contact with the lamp.

After re-soldering it to the springy copper thingy again I haven't had to change any lamps.
Top

Member Spotlight
Member Since: 11/17/00
Posts: 2232
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
0 registered (), 58 Guests and 8 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 49
HotLine1 43
gfretwell 18
Ruben Rocha 12
Trumpy 9
 
Newest Members
Freecrowder, clee512, Jdscott2005, FAIZAN, Regitest2

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals