In article ,
David wrote:
I'm currently installing some fluorescent tubes. The fitting
instructions state:
"Important notice: switch start ballast casings may reach high
temperatures in normal use and may damage standard insulation cables.
Where supply cables run adjacent to choke, use cable rated at not less
than 150 deg C, or alternatively use heat resistant sleeving".

I'd query you using switch start ballasts in this day and age - have you
investigated electronic types? They only get mildly warm.

--
*Arkansas State Motto: Don't Ask, Don't Tell, Don't Laugh.

Dave Plowman London SW 12
RIP Acorn