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Post by birkie on Sept 25, 2017 1:21:49 GMT
Flashback? Aluminum is still used in power distribution to homes. The main feed on my house is aluminum. Everything else is copper. Flashback to a dark, dark period in building science where a flurry new and cool ideas stood ready to rapidly conquer the ills that had plagued structures for centuries. A solution to any problem could broadly deployed without the burden of wisdom or practical experience. A simple spike in copper prices was nothing. We now know the areas of a house where aluminum wiring works quite well...
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Post by rick on Sept 25, 2017 3:19:57 GMT
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Post by coldspaces on Sept 25, 2017 3:26:48 GMT
Looks good! Sure will be safer now.
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Post by timeswelding on Sept 25, 2017 11:42:51 GMT
Just an observation: I've never before seen a CA form A with rubber insulated wiring. The ones I have worked on have all been fabric insulation and the rubber came into use with the 1934 Form B. Interesting.
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Post by rick on Sept 25, 2017 12:58:05 GMT
Odd maybe late in the year production?
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Post by rick on Sept 26, 2017 2:15:14 GMT
So a couple of issues while working the contactor. For some reason there was a spare screw floating around. Easy enough to fix by removing. The other is a fiber washer that sat on top of the actuator coil had baked into bits.i believe it acted as a cushion for when the contact arm returned. My fix was to just spread a thin layer of high temp gasket maker to the surface. It should be able to take the heat and provides a nice cushion to the arm without making the slapping sound. I also cleaned it all with electrowash.
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Post by coldspaces on Sept 26, 2017 4:04:59 GMT
Your start relay looks amazingly clean after its electrowash bath, never heard of electrowash before but will sure be checking it out!
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Post by rick on Sept 26, 2017 20:29:27 GMT
Your start relay looks amazingly clean after its electrowash bath, never heard of electrowash before but will sure be checking it out! Alternatively you can also get CRC Lectra-Motive electric parts cleaner available at Wally World or AutoZone. We use Electrowash in military aviation by the case.
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Post by birkie on Sept 27, 2017 2:04:14 GMT
Looks real good! I wonder where the spare screw came from?
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Post by rick on Sept 27, 2017 2:32:21 GMT
Looks real good! I wonder where the spare screw came from? I was thinking maybe the heater got changed at some point and maybe the tech lost one. Or it has been there since it was built. There are no missing screws anywhere else in the relay and the loose screw looks to be original.
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Post by elec573 on Sept 27, 2017 4:33:53 GMT
Lose screws have found a few of them in my dr when I opened it up . But at that time peered quality control was not as big an issue .
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Post by blackhorse on Sept 27, 2017 4:46:23 GMT
Lose screws have found a few of them in my dr when I opened it up . But at that time peered quality control was not as big an issue . Whaaaat? Like it is now?!? Buy any large appliance today and look in the bottom of the carton. The Sears truck left me a half dozen cartons to use for heating fuel, every one had "spare parts" in the bottom. Every vehicle I've ever pulled the floor carpet back there were loose screws underneath. If you drop something, grab another. There's no time on the assembly line to look for it.
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Post by elec573 on Sept 28, 2017 6:14:35 GMT
Yes aluminum is still used for feeders into houses and overhead drops and into your house panel . It's a lot cheaper and lighter weight. Breakers and panels are rated for copper or aluminum.
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Post by cablehack on Sept 28, 2017 8:08:57 GMT
Not just spare screws, but my CA-1 had a spare grommet sitting in the cabinet top. Probably fell out of a nearby parts box as it was being closed up.
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Post by rick on Sept 30, 2017 2:42:44 GMT
I removed the inner cabinet to check for rust issues.
Everything looks good with the exception of the nut plate strips. They will require some exfoliation and treatment.
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