Hi all,
Recently, an electrical switch near my toilet have gave off
sparks when I switch it on. It happen only once. My location is
pretty old, coming to 20 years alr. I would like to know, whether
is it still safe to use it, or do i have to call an electrician
asap. I intend to renovate my entire house. So, I would like to
know, if this spark is serious enough for immediate
attention?
The sparks very scary 
p.s. I tried googling alr, but I think i got the words wrong, I
keep getting flashing lights -.-