This is the best place to ask this question that I can find. When do which standards take effect or are necessary? UL / IPC / IEEE / ANSI etc. (oh ya, and IPC) What governs or determines when a standard is necessary or required? Chris Robertson [log in to unmask] > > This is copied from the title page. > > IEEE Std 315-1975 (Reaffirmed 1993) > ANSI Y32.2-1975 (Reaffirmed 1989) > CSA Z99-1975 > > All are the same document, and still I see more variations and made-up > reference designators. I guess the people who need to read it > do not have a > copy. What works, works. > > -------------------------------------------------------------- > ------------------- > DesignerCouncil Mail List provided as a free service by IPC > using LISTSERV 1.8d > To unsubscribe, send a message to [log in to unmask] with > following text in > the BODY (NOT the subject field): SIGNOFF DesignerCouncil. > To set a vacation stop for delivery of DesignerCouncil send: > SET DesignerCouncil NOMAIL > Search previous postings at: www.ipc.org > On-Line Resources > & Databases > E-mail Archives > Please visit IPC web site (http://www.ipc.org/html/forum.htm) > for additional > information, or contact Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > -------------------------------------------------------------- > -------------------