I agree with most of you (if not all) but want to add:
never use green/yellow color combinations for functional earth. Always select another color. Service personnel might mistaken use any y/gr functional ground for safety ground, and invalidate possibly both signal integrity and safety of your system. Insist on using black, or blank, or any other convenient color. Gert Gremmen -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of Gary McInturff Sent: Thursday, December 16, 1999 8:21 PM To: Chris Duprés; Rich Nute Cc: emc-pstc Subject: RE: Copy of: GROUND COLOR CODE FOR CE MARK (EN60204-1) Chris, It is not a requirement to be seperate. You can still use a double nut/stud combination, but the green/yellow must be the bottom wire, and have its own nut and lock washer. The rational is pretty straightforward. The main idea is that this wire not be removed during servicing, because someone may forget to put it back on, and this is the primary mechanism to make certain that the fault current trips the breaker and removes the power. Check your beer mug immediately to make sure its attached. I've seen people fall off of bar stools occasionally, and I am fairly certain improper grounding was the cause. Gary -----Original Message----- From: Chris Duprés [mailto:[email protected]] Sent: Wednesday, December 15, 1999 10:50 PM To: Rich Nute Cc: emc-pstc Subject: Re: Copy of: GROUND COLOR CODE FOR CE MARK (EN60204-1) Hi Rich. You wrote: <There are two kinds of circuits that may be connected to the equipment protective earth terminal: 1) Protective earthing circuits. 2) Functional earthing circuits. Protective earthing wiring must be colored green/yellow. Functional earthing wiring can be colored any other color. In some electronic products, functional earthing wiring is colored black (by convention)--- snip ---.> I totally agree with your views, which you put much better than I. Just to be different/arkward, I always insist that the green/yellow wires have their own terminal. I'm sure that's not a 'requirement' and not always practicable, but I just don't want people fiddling with the protective wires, losing nuts, etc. Cheers, Chris Dupres Surrey, UK. --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
