Ray, I agree with Opinion 1. The required warning must have the following three components:
1) WARNING 2) Risk of Electric Shock. 3) To avoid .........Do xxxxxx. On Fri, 20 Sep 1996 09:24:37 -0700 Ray Russell wrote: > > > Dear Friends, > > I've received some contradicting information in relation to the need > for interlocks, and would like to bring it up to the group for > discussion. We have an instrument that has a removable side panel. A > tool is required to remove the panel and there is hazardous voltages > behind the panel. The user is instructed to remove the panel for > installing options, and maintenance. > > Opinion 1 - Access is restricted by a tool, so no interlock is > required. EN61010-1 sec 6.1.1 states: > > The following Hazardous live parts are permitted to be accessible to > the operator during normal use: > > - parts intended to be replaced by the operator (e.g. batteries) and > which may be Hazardous live during the replacement or other operator > action, but only if they are accessible only by means of a tool and > have a warning marking.. > > Opinion 2 - When an operator is instructed to remove the panel, an > interlock is required. An agency told me that once an operator is > instructed to remove a panel, it is treated as if no tool was required > to remove it. > > Also, if anyone has information on high integrity components, such as > interlock switches and relays, I would appreciate some information. > > Thank you for your thoughts. > > Ray > > [email protected] > Dan Teninty P.E. Senior Design Engineer Product Safety [email protected] FLUKE Corporation Everett, Washington (206) 356-6035 (206) 356-6490 fax
