Hello Townworrier,
I can find no reference to a "Plenium" rating in regards to cable ties anywhere. I have found a "Plenum" rating which applies only in America for cables and plastics to be used in plenum spaces. As these are not sold for use in America they are not given a Plenum rating.
Thank you for using Q&A (CW)
Answered by: Cwalm
Date published: 2022-03-18