How can I get an older version of the NEC (National Electrical Code) online for free? Specifically, I need a copy of the “1975 NEC”. I could get it on Amazon for $29, but I’d rather not pay that much for it if I don’t have to. Or I could get the “Guide to the 1975 Electrical Code” for $9 (which I probably will get). I already checked to see if I could check out the physical book at my library. But it is not available. I also tried to find where it is published online so that I can just simply print out the pages that I need. But no luck.
You can purchase a used copy of the 1975 NEC starting at $7.18 at Amazon:
If you go to the NFPA website, you can you can get free access to read-only copies of the NEC. You will have to sign up for an account though.
Looks like they have 1971 and 1978 versions available.