bill1952
SAWHORSE
Late in a flooring replacement project receptacles and boxes had to be replaced because of construction damage. What was revealed was these were 120 volt 50 amp circuits and at some point over the last 50+ years a 3 pole receptacle had been installed as a replacement. A Hubbel HBL7379. I'm not able to travel to site so don't know the answers beyond what I stated, but, is using a 3 pole receptacle - presumably 2 of 3 for hot and neutral, and the ground for ground, permitted by the NEC?