Hello Chris and everyone, I'm using UL 3101-1 (October 1993) which is in fact IEC 1010 with some deviations.
Section 6: Protection against electric shock, subsection 6.1.1. contains exceptions where "HAZARDOUS LIVE" parts are permitted to be ACCESSIBLE to the OPERATOR during NORMAL USE. Third exception is: "TERMINALS and sockets of operating and measuring circuits, if it is unavoidable for operating reasons that they be both ACCESSIBLE and HAZARDOUS LIVE." It also requires the parts to be non-hazardous 10 seconds after power off, requires that they be "protected as far as possible against unintentional contact by covering , recessing, or position arrangement". It also requires that they be marked with warning markings and statements in documentation. This makes perfect sense to me when dealing with technical operators and not office or home personnel. thanks in advance for your comments, Moshe Valdman ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Moshe, Have you got a copy of IEC 1010 (more correctly IEC 61010 (EN 61010) Safety requirements for electrical equipment for measurement, control, and laboratory use)? I don't have a full copy to hand (it is out of my library at present) but it is not far removed from EN 60065 or 60950 both of which require tool fitted covers. What does Clause 6.12.3.2 (Appliance couplers and plugs) say? I know that moving parts must be protected by tool fitted covers (Clause 7.2). Chris
