RE: Terminal Blocks-Field Wiring Requirements
Don, I am aware of only one difference - Spacing. It is considered that larger spacing between connections are needed for field terminals to allow for, shall we say, potentially lesser controlled installation circumstances practices. Factory wiring is usually performed in accordance with a detailed wiring spec, in a controlled environment where wires are stripped by machine (precision strip length) and under goes QA inspection before shipping/installation of said (wired) product. Due to this perceived precision, less space between terminal connections is tolerated. So, I would guess that for a terminal to be suitable for both, the worse-case spacing (for field connection) would apply. This would also satisfy the less severe (factory) criteria as well. Good Luck, George -Original Message- From: don_macart...@selinc.com [mailto:don_macart...@selinc.com] Sent: Friday, June 09, 2000 1:01 PM To: emc-p...@majordomo.ieee.org Subject: Terminal Blocks-Field Wiring Requirements What's the major differences between a terminal suitable for Factory Wiring and one suitable for both Factory Wiring and Field Wiring? --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Terminal Blocks-Field Wiring Requirements
Don - There are additional details beyond the following, but in essence, there are pull-out and wire retention tests that are done for field wiring purposes that may or may not have been done for factory wiring purposes. Field wiring terminal blocks are subjected to the full range of tests normally applied to wire connectors, except for wire binding screw type terminals, which are separately evaluated. IIRC, the ranges of wire sizes, conductor types, stranding, etc., are more prescriptive for field wiring terminal blocks, than for factory wiring terminal blocks. Regards, Peter L. Tarver, PE Homologation Engineering Nortel Networks ptar...@nortelnetworks.com From: don_macart...@selinc.com [mailto:don_macart...@selinc.com] What's the major differences between a terminal suitable for Factory Wiring and one suitable for both Factory Wiring and Field Wiring?
RE: Terminal Blocks-Field Wiring Requirements
In general, for field wiring terminals per EN60950: * must accept a range of conductors sizes normally expected to be used * use screws or nuts - no solder, crimping or special terminal on conductor (unless a special power cord assembly is being replaced) * the screw or nut cannot directly bind against the conductor in order to prevent damage from rotation * a spring or similar to guard against a loose connection * sufficient spacing to ensure that a loose wire strand will not short to the next conductor variances for internal wire terminals * acceptance of a single size wire is sufficient * almost any kind of reliable terminal and fastening means may be used * a secondary retention method is required if a loose wire would cause a hazard Richard Woods -- From: don_macart...@selinc.com [SMTP:don_macart...@selinc.com] Sent: Friday, June 09, 2000 1:01 PM To: emc-p...@majordomo.ieee.org Subject: Terminal Blocks-Field Wiring Requirements What's the major differences between a terminal suitable for Factory Wiring and one suitable for both Factory Wiring and Field Wiring? --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: EMC Symposia CD of 1955 to 1995
The CD is available through the IEEE EMC Society for $40 dollars. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
