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Hot Lamp! #114748
06/20/03 04:30 PM
06/20/03 04:30 PM
Admin  Offline
OP
Administrator
Member
Joined: Oct 2000
Posts: 3,481
NY, USA
[Linked Image]

[Linked Image]
Quote
There was a short in the fixture containing this lamp.

It got so hot that it melted an indentation about 1/4" deep X 1" diameter into the lamp.
I remember seeing staggering statistics regarding the temperatures developed during shorts, the amount the actual burned copper expands, etc.

Does anyone here have this information?...S
(Electure)

Tools for Electricians:
Re: Hot Lamp! #114749
06/21/03 12:19 AM
06/21/03 12:19 AM
B
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...

Re: Hot Lamp! #114750
06/23/03 12:33 AM
06/23/03 12:33 AM
T
ThinkGood  Offline
Member
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI

Re: Hot Lamp! #114751
06/23/03 09:45 AM
06/23/03 09:45 AM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,916
Brick, NJ USA
Looks like a 1000 or 1500 watt mh/mv bulb!
Nice "toast" job.
John


John
Re: Hot Lamp! #114752
06/23/03 10:12 AM
06/23/03 10:12 AM
M
mamills  Offline
Member
Joined: Nov 2001
Posts: 745
Wharton, Texas, USA
Electure:
Kinda curious to know, how did this situation resolve itself (i.e. fixture burnout, OCPD trip, etc.)? I've seen them before where the inner envelope was completely disintegrated, but not burned like this one.

Mike (mamills)

Re: Hot Lamp! #114753
06/23/03 11:56 AM
06/23/03 11:56 AM
B
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
It’s been a few years, but I think MH-lamp producers have designed in a fusible link between the inner and outer lamp envelopes that is supposed to melt open if exposed to air for ±30 minutes.

But now, in Anaheim I’ve heard they use a dozen 1500W models in each of their industrial-grade tanning booths at local juice bars. ;-) [Sorry, Scott. Couldn’t resist… You can post some bad jokes about Yreka if you want.]




[This message has been edited by Bjarney (edited 06-23-2003).]

Re: Hot Lamp! #114754
06/23/03 01:36 PM
06/23/03 01:36 PM
electure  Offline

Member
Joined: Dec 2000
Posts: 4,263
Fullerton, CA USA
It's a 1000 watt Metal Halide.
The guys "reversed the optics" (spun the reflector), and ran the wires right over the lamp.
Mama mia, these things get hot. I'll get a pic of the rest of the reflector, and send it to Bill.
("Off the wall" memory thing...Seems 7000°F)??...S

Re: Hot Lamp! #114755
06/24/03 09:31 PM
06/24/03 09:31 PM
T
ThinkGood  Offline
Member
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI
Anybody here familiar with a "breakdown test set" used by some telcos? I believe it actually welds copper conductors together to make that pesky cable fault easier to locate. They send around 650VDC over the copper...

Re: Hot Lamp! #114756
06/26/03 07:40 AM
06/26/03 07:40 AM
electure  Offline

Member
Joined: Dec 2000
Posts: 4,263
Fullerton, CA USA
Bjarney, Doesn't Yreka sell lots of these 1000 watt lamps to the marijuana farmers??

Re: Hot Lamp! #114757
06/26/03 09:52 AM
06/26/03 09:52 AM
T
ThinkGood  Offline
Member
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI
Just don't sell them flash bulbs ...

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