ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Photocell
by Docholiday. 01/22/18 10:52 AM
AreMetal Ladders Ever OK For Electrical Work?
by gfretwell. 01/22/18 01:15 AM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 21 guests, and 13 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Teachers burned by UV light from cracked halide lamp #148351
09/16/04 03:04 PM
09/16/04 03:04 PM
Admin  Offline
OP
Administrator
Member
Joined: Oct 2000
Posts: 3,482
NY, USA
Teachers burned by UV light from cracked halide lamp
9/14/2004

Source: Canadian Occupational Health and Safety News
Quote
September 13, 2004 -- Moosomin, Sask (Canadian OH&S News)--The first day of school was delayed for Moosomin, Sask-area teachers and students when teachers reported sunburn-like symptoms after attending a back-to-school meeting in the McNaughton High School gymnasium.

About 90 teachers from five schools attended the all-day meeting. That evening, 26 teachers, who had been sitting together in a small section of the gym, reported painful rashes, burns, eye irritation and facial swelling. Twenty-two sought medical attention, and six were kept in hospital overnight for observation, says Department of Labour spokesman Dallas McQuarrie.

Classes at McNaughton and MacLeod Elementary, which were scheduled to start September 1, were cancelled pending a health and safety investigation to determine the source of irritation.

Occupational hygienists from the Department of Labour tested air and dust samples when the incident occurred on August 31. But the irritant remained unknown until a maintenance person, who was replacing a metal halide light in the gym, noticed a crack in its outer shell. "One of the lights seemed to be burning at a different colour than the others, so when he changed the light, he noticed the envelope was cracked," says Harold Laich, director of education for Moosomin School District.

McQuarrie says the teachers suffered various degrees of sunburn due to a leakage of UV radiation from the light bulb, comparable to a burn experienced by sitting all day in the sun. The Labour department plans to issue a hazard alert on these bulbs, warning employers of potential UV exposure risks.

In the mean time, Laich says all metal halide lamps at Moosomin District 9 schools have been checked, and will be replaced with safety lamps designed to automatically extinguish the arch tube when the outer envelope is cracked.

The Canadian Centre for Occupational Health and Safety says whether occurring naturally from the sun, or artificially from sources like mercury lamps and welding equipment, UV rays can be hazardous depending on the wavelength, intensity and duration of exposure.

The labour department is continuing its investigation. Classes at the two schools resumed September 3.
(submitted by Tony Moscioni)

Arc Flash PPE Clothing, LOTO & Insulated Tools
Re: Teachers burned by UV light from cracked halide lamp #148352
09/18/04 09:15 AM
09/18/04 09:15 AM
Trumpy  Offline

Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
Thanks for the "heads-up", Tony!.
Strangely though, this isn't the first time I've read about this.
I have also heard of the 250 and 400W Metal Halide lamps exploding after having cracked outer envelopes. [Linked Image]


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
akmaster
akmaster
alaska
Posts: 70
Joined: June 2012
Show All Member Profiles 
Top Posters(30 Days)
Admin 21
sparky 15
Potseal 15
Popular Topics(Views)
243,595 Are you busy
180,393 Re: Forum
170,862 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.021s Queries: 14 (0.007s) Memory: 0.9446 MB (Peak: 1.0593 MB) Zlib enabled. Server Time: 2018-01-22 19:52:45 UTC