My brother bought an old frame house and had it moved onto his property back in the '80s. When he crawled up in the attic, the wiring had cloth insulation, and splices were twisted together and BARE with no tape or anything on 'em.I used to know a couple of staff electricians at OU, and they had some stories to tell. Let's just say that electrical codes have changed a mite in the 100+ years since some of those buildings were built (and electrified), and not all electrical contractors do everything according to Hoyle.
Needless to say, he rewired everything.