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That’s typically on the aluminum wires to prevent oxidation. I’m not sure if it helps copper connections.I also noticed some electrical grease around some of the much thicker cables that go into the breakers. I'm guessing that this would also be a good precautionary practice to keep the area from getting dirty and exposing the contacts to debris and such. Not sure I'll do it, but it's probably a good idea based on what I see on other high current rated breakers in the panel.
Hubbell outlet is out for delivery today so I'll have it within hours. Will be posting some pictures of it and comparing it to the cheap Leviton. Will make sure it's torqued properly and should be better now that I torqued the breaker. All this should add up to some improvements in heat generation. Will keep this thread posted on my progress.
Ok, I got the Hubbell HBL9450A outlet tonight. Took pictures of the contacts inside the two load-bearing slots.
There's a reason why, whenever I install data center equipment for my customers, we use either Hubbell or Mennekes connectors and receptacles.
I've never installed a PDU with a Leviton power connector, ever ...
Generally, heat = resistance
Heat will not trip a breaker, power surges do.
Did some checking on my system today.
Just at dark. Ambient temp around 90 degrees. Wall of house (stone), breaker box, and other breakers read around 96 degrees. All in the shade after 11am (most of day).
Main breaker (200a) read 106 degrees.
50a breaker to HPWC read 115 degrees.
Temp is rising more than I thought. Still easy to touch.