Very similar design to the ones I have but I think these are smaller in diameter. Mine are just under 6" in diameter. Here's one I installed in my basement to take a pic of. I cut lenses for them out of a large plexiglass sheet from Home depot (cut them with tin snips then sanded them smooth and sanded one side to make them frosted). I ordered some candelabra sockets online for them and I'll be repainting them (haven't decided what color yet, though I might do hammered black with a red or gold reveal). I've had these awhile and the idea dawned on me that I could make some really cool nightlights out of them lol.
It's too bad they're not waterproof or I'd use them as mini outdoor flood lights lol.
BTW very nice work too! (I assume you installed all these?) I see so many sloppy EMT jobs by master electricians it drives me nuts. Especially in schools where they want cheap, cheap cheap!
Yours sound and look like par 46 ! Cool ! Yes it was all me, I have put in around 50 heads now, Thanks ! I never use MC as you can tell, I put lots of pipe in the wall
Long story, Yes very. I look at photos of old hospitals and lots of the ones from the 30s had 32v sytems, 40s all have par 46 system heads 6v that way they would need less of them because they give more light. The 60s came in and Hospitals when with par 36 24v 7 or 12w heads, you need more heads but even light and less voltage drop. the 80s gave us a massive rush of 12v systems and plastic heads called the H head but light guard, they were halogen more voltage drop but less power needed. Today the huge thing is the universal par 36 12 / 24v aouto switch led 9w 800lm heads (as seen in the photo) and they are so nice they have to be metal to act like a heat sink
Ah so the PAR46 heads date as far back as the 40s? Mine look like they're from the 70s, but they don't have a ground. Would a ground even have been required on such a low voltage head even though they're metal? Of course, the boxes might have been grounded instead of the fixtures if they were metal, which I'm sure they were...
Yeah the ground is alays a good extra step. Not so much for what the conduit is powering, but if let's say a 120V wire from another circuit touches the conduit for one of the emergency heads, the whole pipe system is live! Not good! My grandpa owns an autobody garage from 1940 and I don't think anything in the place is grounded. Almost all the electrical is in EMT or rigid, running on the surface of the concrete ceiling or cinder block walls. He wants additional lighting in the shop so if he has me do it, I'll probably run new #12 stranded conductors in EMT and make it all grounded. Rapid start fixtures have issues starting when they're not grounded.
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It's too bad they're not waterproof or I'd use them as mini outdoor flood lights lol.
BTW very nice work too! (I assume you installed all these?) I see so many sloppy EMT jobs by master electricians it drives me nuts. Especially in schools where they want cheap, cheap cheap!