Regarding the Installation Instruction for Hardwired Power Strips:
Since the new thinner type of hardwired power strip was introduced using the terminal connection covered outlets, the plastic insulation sheet was eliminated, completely meeting ETL (UL testing standards) safety guideline, but we have not updated the printed installation guide up until summer of 2017. Thanks to Steve of Saint Charles of MN, or this little mistake may still be carried on for who knows how long.
When our hardwired power strips are purchased and to be installed, the Plastic Insulation Sheet is not seen as per the old Installation Guile, please do not be alarmed, it is no longer needed. Here comes more details: