Ok never posted here before. Been lurking for years on this site. Lot of good advice. So here is my question. Recently worked on troubleshooting some lights at a postal facility. Noticed in the conduit over head green wires that were HOT! Ended up I had to open up the panel and behold the 480/277 panel had black, blue, red, and GREEN wires on the breakers. This building was dedicated in 1959 under President Eisenhower. So my question is was it ok under the NEC to use green wires on breakers in 1958-59? This may be a fun one to research. By the way in another post office I saw a lot of Federal Pacific equipment. Need to get pictures.
