In addition to the regular CSA certification for use in non-insulated ceilings (non-IC) applications, this model has been CSA certified to be installed in insulated ceilings (IC) applications when used with an appropriate LED lamp Permits the installation in ceilings up to 1-1/4 in THK Wire to wire connectors Clamp behind the knockouts secures the residential cable safely in place which means there is no need for a grommet Damp location listed