ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
sparky 5
Recent Posts
Permit Snafus...AHJs and Contractors Jump in
by HotLine1. 04/30/17 02:30 PM
201 volt equipment?
by bigpapa. 04/29/17 12:15 AM
Schneider LC1D09
by jraef. 04/28/17 11:05 PM
Electrode boilers question
by annemarie1. 04/27/17 01:40 PM
Why cables look like they do
by LongRunner. 04/26/17 09:36 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
235,051 Are you busy
169,903 Re: Forum
163,082 Need opinion
Who's Online Now
0 registered members (), 57 guests, and 7 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#166674 - 07/25/07 06:42 PM Juno recessed cans  
jkraft  Offline
Member
Joined: May 2003
Posts: 74
I'm servicing a commercial customer with some Juno 4" cans in a display case and they keep cycleing off and on. The lights are mounted above the merchandise in a seperate compartment that seems fairly large. There's plenty of room for the non IC cans and their base plate and junction box. There is no thermal switch mounted right on the can but some sort of a black cylindrical set of contacts sticking out of the junction box. This device immediatly gets hot when the lights are turned on as if the current of the lamp is overheating it. I'm using 50PAR20 lamps although the fixture says 50R20 or 50PAR16. The problem just started after years of service using the 50PAR20 lamps. Are those contacts replacable? Is there a 30PAR20 lamp?


Work Gear for Electricians and the Trades

#166682 - 07/25/07 08:53 PM Re: Juno recessed cans [Re: jkraft]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,812
Brick, NJ USA
Yes, you can replace the thermal....BUT, it must be JUNO's.
Yes, there is a 30PAR20 lamp (WW Grainger Catalog)
The fixtures are 'cycling' due to the thermal OL; be it old age, wrong lamps for to long, or poor ventilation, or a combo of the above reasons.
Also, bulb (30) is physically larger than 20, and PAR bulbs reflect heat back, as opposed to "R" lamps. The PAR heat is the 'root' of the problem
John


John

#166691 - 07/25/07 10:24 PM Re: Juno recessed cans [Re: HotLine1]  
jkraft  Offline
Member
Joined: May 2003
Posts: 74
Originally Posted by HotLine1
The fixtures are 'cycling' due to the thermal OL; be it old age, wrong lamps for to long, or poor ventilation, or a combo of the above reasons.


Would it be a thermal overload even though it's mounted in the j-box, 8 inches away from the lamp?


#166707 - 07/26/07 03:16 PM Re: Juno recessed cans [Re: jkraft]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,812
Brick, NJ USA
There are/were some thermals that functioned via the current draw. I do not know if Juno used/uses those.
John


John


Member Spotlight
Radar
Radar
Los Angeles, CA
Posts: 349
Joined: April 2004
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.011s Queries: 15 (0.002s) Memory: 0.7603 MB (Peak: 0.8931 MB) Zlib enabled. Server Time: 2017-05-01 06:23:04 UTC