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Joined: Oct 2000
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[Linked Image from joetedesco.com]
[Linked Image from joetedesco.com]
[Linked Image from joetedesco.com]
Courtesy: ERI


Joe Tedesco, NEC Consultant
Arc Flash PPE Clothing, LOTO & Insulated Tools
Joined: Jan 2003
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Good thing he was wearing gloves!

Joined: Oct 2000
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Yes, but you should see his face!

Terrible burns, and permanent disfigurement.

Interested persons can ask me for copies of the images via email ...


Joe Tedesco, NEC Consultant
Joined: Sep 2001
Posts: 806
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I think the thing that would have exploded would be that control transformer! You can read the original diagram that shows that it is a standard 240/480 primary type.. [Linked Image]

Joined: Apr 2002
Posts: 2,527
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Siding with NJel, the ‘2300’ label must have been a ‘prop.’ Looks like the upper wiring is {SIS} 600V-class, and those hosed-up oversized crimp terminal are king of pathetic. The visisble CPT termainls do not apprear to have adequate creep and strike clearances for 5kV-class components.

OTOH, the star character should have had to defeat a mechanical door interlock to get into a live situation. [That 60%-polyester laundry-service shirt will now have emergency burn-unit workers cussing while trying to separate molten fabric from skin on his chest.]

For 600V-class work and instruments, serious consideration should be given to "IEC 1010-1" overvoltage-/installation-category numbers.




[This message has been edited by Bjarney (edited 06-06-2004).]

Joined: Oct 2000
Posts: 2,749
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Very sharp eyes, and thanks for the comments. This was a video and I sent the editor the link to this page. The video is a good one though, but not for real, of course, just actors!


Joe Tedesco, NEC Consultant
Joined: Jul 2002
Posts: 8,407
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Just as an aside guys.
Wouldn't a transformer like this have to be fitted with a shroud on them bare terminals?
Or even just a cover to prevent shocks when working around other equipment in the same panel?.

Joined: Apr 2002
Posts: 2,527
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Moderator
IEC-like ‘fingersafe’ terminal covers are a comparatively new addition for UL/ANSI industrial-control equipment. They are typically available as an aftermarket accessory, so there will be a lot of equipment that will not ‘catch up’ for awhile.

The get the impression that in North America is that, if the cabinet door is opened, only qualified people familiar with shock and short-circuit hazards should be working on it.


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