502.15 sealing

[sokkerdude]

What does 502.15 (1) A permanent and effective seal mean ? I'm working at a power plant
in Texas and we are putting sealing putty into the end on conduits to seal. Is that considered a permanent and effective seal? Thank for any help

 

[cowboyjwc]

The code section you quoted talks about "dust".

Is that what you are trying to keep out?