While some people almost got it, the winner is @rmeier2 , non-member guest. The prize is, um, this acknowledgement.
@bcawhern1 I don’t like the conductive “zip tie” either.
- The three breakers indeed have whites relabeled as hots.
The defect I almost missed is:
One of those is missing on the top breaker pair, thus is possible for just one of the 240V space heater legs to trip. These were missing randomly in other subpanels in the same building, you could easily imagine them pulling off when the breaker is flipped manually.
For those who identified missing or cut grounds: the grounding is just how it was done back then. Every circuit is grounded. All the ground work was done behind the box back in the day. Note the gauge of the ground wire, and that you might today call this “bonding” not an EGC:
So that’s not current code, but does not count as a defect in my book.
But the continued use of the old Zinsco panel counts as consequence of code. The building manager told me they started a project to replace all the old Zinsco panels, but the project died in permitting due to cost of
(a) moving the panel out of the closets (and the violence to the building to do so).
(b) the necessary wire work to modernize the grounds.
(c) provision of AFCI breakers