3: Although the GFPE does not directly scan for Series Arcs, there was evidence in some of the effected 4s Boxes, showing L-G Arcing.
To me, the Termination issues discovered on this Project are very rare scenarios. I had been in the field for at least 24 Years when discovering the Bad Terminations. Prior to this I had uncovered only a few (no more than 5) such situations - only there was a single Termination issue (only One Wirenut in One Box total), and the Wirenut was either an obviously over-used Ideal, Scotchlock, or something in the "El-Cheapo" line...
My Conclusions:
c: The Wirenuts in this case were damaged from excessive Heat, caused by drawing 100% LCL Current through the internal spring mechanism of the Wirenut,
d: Little, if any, Series Arcing was experienced in the Wirenut,
-- Scott
Scott, please allow me a rebuttal here.
a
bad connection is the most common malady of the electrical trade,
said bad connections are usually seen as
overheated terminations
this can be described as a
series event, or a
'glowing contact'give me free rein in any house wired a
generation ago, and i'll wager i'll find you multiple examples
further, a
glowing contact can produce incendary levels
before an arc occurs
UL has finally come around recently to recognize said
glowing contact as a major fire safety consideration
please look at the latest IEEE paper via a Mr Joe Engle, phd, for this>>>
http://www.combinationafci.com/resources/doc_ieee_combination_afci.pdfthank you
~S~
