[PSES] IEC 62368-1 ES3/PS3 cold impact test

Folks, When do we need to do IEC 62368-1 ES3/PS3 cold impact test as per IEC 62368-1 Third edition. I was told if EUT is powered by ES3/PS3 then it is required. any insight will be helpful Thanks in advance Christopher - This

[PSES] Support for Europe Drinking water regulations

Good morning all I am looking a consultant that has knowledge in Europe Drinking water regulations and can support for backflow approval devices according to DVGW, Kiwa, WRAS,... Any one recommendation? Thank Kind Regards / Saludos cordiales / Mit freundlichen Grüßen Daniel Rodríguez Sr.