In article
,
Ron wrote:

I can't find the circuit breakers for any of the upstair bedrooms in
this old, 1908 built house. Would it be reasonably safe to replace a
light switch wearing rubber gloves and rubber-soled shoes if it comes
down to having nno other options?

Ron

I think it's safe enough to change a switch hot, but you're going to
have to find those breakers (or fuses, you might have a mixture) sooner
or later. Why not find them now while you've got a good but not
emergency reason to do so?