And here is the spec. of Hubbell 8300. I scratch my head why there are so many folks recommend this particular receptable while its power-contacting material is primarily brass - 25-30% of thermal conductivity of copper. And you know steel is worse. Why why why, ask bud dry...
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The above specs is for a current production Hubbell 8300 duplex outlet. Junk for feeding audio equipment, IMO.
You would have to find a NOS Hubbell HBL8300 Hospital grade duplex receptacle that Hubbell stopped making many, many, years ago.
Here is an example of a HBL® Extra Heavy Duty Industrial Series that was the base unit for the 8300 hospital grade outlet. Go to page 6 and see the cut out of the outlet.
FWIW the only difference between the two outlets is the 8300 has a green dot, signifying it is listed as a hospital grade outlet. Therein the equipment ground contact is beefed up to withstand more physical abuse and to maintain contact pressure against the male ground pin.
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Here is a NOS Hubbell HBL8300 in red. Note the solid brass supporting back strap.
https://www.ebay.com/itm/304961907798?chn=ps&mkevt=1&mkcid=28&google_free_listing_action=view_item
FWIW, back in the day, no longer made, was the Hubbell 8300 Compact/Slender body hospital grade duplex receptacle. It was preferred over the deep body HBL8300 outlet by many audiophiles back in the day.
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