Commenter Mark identified a number of potential problems with the heater installation in my airplane, pictured in Monday night's post. The heater looks perfectly normal to me, and I've flown a number of these airplanes maintained by various people. This particular airplane has been in and out of various shops and no one has complained about the heater installation, but standards vary. I'm neither an AME nor an electrical engineer, so I'm not really qualified to pronounce one way or the other. I printed off Mark's comments and gave them to an AME. He chuckled a bit, but went back to arguing with a recalcitrant grease nipple on my nosegear without offering any specific rebuttal.
But as a bonus to Mark for his interesting analysis, I present a photograph I took some time ago, of wiring in an actual working airplane. I took this in a maintenance hangar some time ago. I no longer remember why.
Mark? Mark! Are you okay?