On Mon, 01 Nov 2010 12:00:24 +0000, Dave Osborne
wrote:

if you can mount the switch either way (which I expect you
can) then you can mount the patress either way.

Thanks for all the replies. I have mounted the box upside down. The
lug is a bit of a red herring, it does not foul the switch, so it
seems the switch can be fitted in either direction.

TBH I'm not sure which way up my switch is fitted, I didn't realise
until today that they had an "up" and a "down".

I can understand the need to have a top on other switches (e.g. FCU or
20A switch) that have a red bar painted on the rocker or the word "ON"
to show that the switch is on but I've never seen a light switch with
either of those markings; if wired 2-way, either position could be on
or off on a light switch. Perhaps it's just cheaper for carabtree to
print "top" on the backs of all their accessories whether they need it
or not?

I've also fitted a crabtree 3-gang light switch this afternoon. I
carefully trimmed some of the wires longer than others, only to find
that the switch had "top" marked onto it and I had trimmed the wires
to suit it the other way around. I was going to ask does it matter if
I install the switch upside down to save me re-doing the wires but
from the answers given already, it seems I will be fine to do so,
which I have done.

Thanks.