Most electronic product manufacturers (Acer, Epson, etc) do not have the CSA or UL approvals directly on their main equipment because they operate on low voltage … like the MerMaid, Volucalc, etc. It is on the power supply of their products, which are connected to higher voltage, that you can see the CSA/UL sign. To have a CSA or UL approved panel, everything that should be approved must be approved, but it is not everything. Most low voltage/low current equipment are not required to have it, but many do not know this.