Originally Posted By: Randy Flockton
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The photo above is from a state owned facility (A snack bar literally “on” the beach, in CA) & is one of the many signs of amateur persons performing electrical work.
The wiring method here is FMC or “flex”, the above conduits (?") had approx 12-15 #12 THHN stranded current carrying conductors inside… (for those seeking a code reference see 348.22 NEC)
Excessive current carrying conductors in a raceway reduce the ability for efficient heat dissipation.
An example of a violation of 300.4(f) was right above where this panel was, at a smaller subpanel... The conductors entering here are #2THHN... Yeah, I know, the breakers are double lugged also ![icon_rolleyes.gif](upload://iqxt7ABYC2TEBomNkCmZARIrQr6.gif)
This raceway also from the same place should have no problem dissipating heat.... Most of it is in rust particles on the ground! (speaking of ground, this "was" the ground for the above switch)
This outlet had some heat dissipation problems... (fed a commercial freezer)
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