Greetings all, thanks to those who replied to my INMETRO request (INMETRO = Instituto Nacional de Metrologia, Normalizacion e Qualidad Industrial (of Brazil). (From the name it appears to be analogous to our NIST) Questions via e-mail to <[email protected]> Website (in Portuguese) at: http://inmetro.gov.br President J#lio Cesar Carmo Bueno Secretary: Icla Phones: 223-8877/225-8032 Fax: 223-4283 (Thanks Rich and Art)
Now, a new question. We are designing our first all non-metallic enclosed stand alone product and i am confused about the earth terminal. I don't need a protective earth terminal but need a functional earth terminal. There is absolutely no metal frames, supports etc... The ground is needed for cable shields, transient protection, etc... So i need to bring ground into the box. Can i bring it in "normally" as the third conductor of the power lines (Hot, neutral, ground)? Only call it functional ground? If so do i need to hi-pot between H+N and this ground? Or do a double insulation test? What about on the 12V circuit that has transient protection to this functional ground? I can't run a dielectric test between signal and function ground as it will naturally fail thru the transient protection. Your thougths please. This is a 120/240 VAc powered device. thanks eric [email protected]
