The requirements of the main LVD standards are not consistent. In EN60065 and EN61010-1, there is no requirement for marking anything other than the earth terminal.
In EN60335-1, EN60950 and EN60730-1 it depends on whether or not it is possible to change the mains cord. If it is, both the earth and neutral terminals should be marked (but funnily enough, not the live). This applies whether the mains cord can be changed by the user or by the manufacturer. Only for 'type Z attachment' (mains cord cannot be changed and unit must be destroyed if the mains cord is damaged) is marking of any sort unecessary. In fact the standards say that terminals exclusively for the neutral conductor should be marked 'N', so if the mains lead is reversible no marking is required. However, this is the exception rather than the rule, in my experience. Nick. At 14:12 -0400 3/8/99, Chuck Seyboldt wrote: > Is there a EU-wide convention for the marking of >terminals in a single-phase appliance? > > It is understood that the PE terminal must be marked or >identified with the green-yellow color, but is there any >expectation or requirement that "L" and/or "N" be present? > > What if only "L" was present? only "N"? neither? Is >there any objection to marking both "L" and "N"? > > In the risk assessment for a hypothetical device, no >additional hazards are created during operation if the live and >neutral lines are switched. One could argue that a service >person would rely on the "L" or "N" or similar marks in order to >know which lines were potentially live, if the appliance was >connected to power for troubleshooting, but IMO, competent >service people would not endeavor to work with a conductor unless >they were certain it was not live. > >Regards, >Chuck Seyboldt > > >--------- >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).
