Hello!

I am planning on building a rack pretty soon but I had question about the heat tape installing.
I have seen couple different ways of installing heat tape, which were separate heat tape pieces connected with wire into one power cord and just one long heat tape going through all levels of rack.
I am probably going to build 2~3 level rack first and I was planning on doing just one long piece of heat tape through the rack. However, I was wondering, if the heat tape is slightly bent and is going through different levels, heat tape would end up being upside down on one of the level, if you guys understand what I am saying.

So basically, my question is, is it okay to have heat tape upside down? any problem with it giving off heat?