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Old 10-12-2019, 08:18 PM   #21
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I started in the trade many years ago. Until somewhere around the late 70s or early 80s, most jobs/ employers were stingy with material and wasteful with labor. Now days general use materials are considered cheap and labor is controlled more closely.
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Old 10-14-2019, 11:32 AM   #22
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I know I’m probably hacking this hackneyed saying, but here goes:

Most people see a glass half full as missing half of its potential, an engineer sees a glass that was designed twice as big as it needed to be...
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Old 01-23-2020, 02:53 PM   #23
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Was just about to post a picture of an old frank adams panel i got here at the hospital. Wtf? Still cranking out the electrons tho. After 20 posts i will. How do you turn the breakers off? Looks like a drawer you pull out. Crazy. They also have circuit 123456 ect down the left side. Not 13579.

I built a few public schools the past 10 years and they passed the ceiling with tons of open j boxes and waaaay more to be done. Somebody paid somebody my guess.
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Old 01-23-2020, 07:57 PM   #24
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Quote:
Originally Posted by HertzHound View Post
During the OPEC oil embargo, they came up with a way to make synthetic plastics using very little oil. The BPA caused men’s testosterone to decrease and estrogen to increase. They no longer could bend heavy wall conduit, let alone lift panel boxes or stuff wires into panels. So they came out with Thin wall conduit and reduced the amount of steel and copper in most items.

As family sizes decreased the need for greater immigration became apparent. Soon we will become a nation similar to the movie Wall-E. We will be so weak that we will need robots to do everything for us.


Hertz, we know you were fooling around here, but for the sake of the children on the website: EMT was around for a heck of a lot longer than the oil embargo happened:73/74. How long before I don't really know, but I have seen benders in my time that looked like they were made around WW2 time.
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Old 01-23-2020, 08:03 PM   #25
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Just checked. EMT= 1920's.
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Old 01-26-2020, 09:42 PM   #26
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We are working a city block of buildings built in 1886 . We are doing the power upgrades . One building still has the gas lamp lights still working . The ones they pulled wire thru when electricity started to become the thing . The last panel installed was 1972 . The oldest I have found is 1931 . Discos you can sleep in . 1000 mcm cloth wrap wire for a 400 amp MDP .

They young strong kid we have as a helper drools as we toss this stuff on the ground . He is a scrapper and other than my pic of the litter he gets to scrap it all . Those copper busses are money .
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Old 01-26-2020, 10:19 PM   #27
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Just checked. EMT= 1920's.
IIRC, Republic Steel invented the spec. and was for a time its sole source.

It ONLY took off after Benfield invented the ONE-SHOT hand bender.

IIRC Benfield was a Republic Steel travelling salesmen and he was getting tremendous resistance because a hickey -- the hand bender everyone knew -- would kink EMT all day long.

Hauling around a Chicago bender is totally impractical for the crew.

The contractors loved the price,... bending in the field was the issue.

In the Great Depression, EMT started to really take off.

It was priced so much less... and was easier to tote.
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Old 01-27-2020, 06:20 PM   #28
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On top of that, prior to 1920, most electrical enclosures were made of cast iron, not sheet metal. So it was very time consuming to run a conduit into a box like a disconnect switch or motor controller, but it wasn't the conduit that was the issue, it was the box itself. The Detroit Fuse & Manufacturing Company were one of the first to create a switch in a sheet metal box for the Automotive mfrs., partly in order to facilitate faster changes to production lines. Then EMT followed shortly thereafter because now the rigid conduit was more time consuming than making the box connections.

Side note: that company making the sheet metal switches used a logo stamped into their boxes with a "D" for Detroit inside of a square box and eventually they changed the name of the company to what everyone was calling them anyway, "the company that makes those square D switches", or as we know them now, Square D. (I worked for Square D back before they were bought out by the French and you learned that story on day one of your orientation. I always thought that was a cool story).
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