Photography And Half-Thoughts By Mitchell Hegman

...because some of it is pretty and some of it is not.

Monday, January 9, 2017

The Jasmine Flankey Story

We lost Jasmine Flankey on July 4, 2009.   When I say “we,” I mean Montana collectively.  More specifically, I mean electricians and inspectors in Montana.  When I say “lost her,” I mean she is dead.  More accurately, she was killed.
Jasmine died as a result of electric shock.  She perished when she touched the metallic ductwork of a roof-mounted HVAC unit.  The ductwork had become energized by a faulted lighting circuit inside the building below.  In an effectively grounded electrical system, the ground-fault energizing the ductwork would have caused a breaker to trip and cleared the fault, rendering the circuit harmless.
The whole story is a bit complicated and technical.  Put simply, had six inches of wire been used to “jumper” between that electrically isolated section of duct and the rest of the grounded electrical system, Jasmine Flankey would not have received life-ending electric shock.  As it was, the duct remained energized, deadly.  When Jasmine—while in contact with that duct—touched a properly grounded metallic piece of equipment, electric current surged through her body.  She had been on the roof of a church in Missoula, Montana to watch fireworks.  Jasmine was eight at the time of her death.
At one time, I actually objected when an electrical inspector in Helena wanted me to install the same kind of six-inch jumper wire at several sections of ductwork on a job under inspection.  I thought he was overreaching.  What good was a six-inch bonding jumper on non-electrical ductwork?
I was ignorant.
Today, that girl and I are driving to the headquarters of Yellowstone Park in Mammoth Hot Springs.  Tomorrow, I am teaching a grounding and bonding class to a dozen park employees there.
It’s a big deal.  Grounding and bonding is a big deal.  It’s a dense subject.
The class will begin with a telling of the Jasmine Flankey story.  As a class, we break down the grounding system that killed her. Then, we spend eight hours discussing the hundreds of other details associated with grounding and bonding—one hour for each of Jasmine Flankey’s years.

--Mitchell Hegman

No comments:

Post a Comment