G'day Matthias In Australia we have a similar bias although wire nuts are used. As well, within the lighting industry products commonly use wire cage connectors which have European approvals (commonly called push wire terminals). At least 1 major European manufacture clamps wire between a phosphor bronze leaf spring and the polycarbonate body of the connector. - which will flow under constant pressure?
Perhaps I am overlooking something ( often happens ) but I am struggling to see why wire nuts with a metal insert are less reliable in low voltage , low current (less than 10 amp) situations. Tony Lamont Pierlite Pty Ltd -----Original Message----- From: Matthias R. Heinze [SMTP:[email protected]] Sent: Friday, May 29, 1998 5:52 AM To: Russell, Ray; 'IEEE PSTC' Subject: RE: Twist on Connectors Hu, this is a good one. It could be a bit of cultural preference more then standards. To my eyes they just look unsafe! At TUV we have traditionally rejected them. However, I do not recall ever seeing a standard (and I have seen a lot) that explicitly forbade the use of twist-ons. They certainly do not provide double securement (such as crimp connections), screw terminals don't do that either. They also excert pressure through metals only (plasticity in the copper alloy?). Should I change my mind? Matthias R. Heinze TUV Rheinland -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Russell, Ray Sent: Thursday, May 28, 1998 6:58 AM To: 'IEEE PSTC' Subject: Twist on Connectors Greetings, Here in the US, twist on connectors or wire nuts are commonly used for all type of wiring applications. We have a product where the AC primary line cord connects to the winding of a motor. We are currently using crimp type connectors. But some bean counter found that he could save a penny and wants to change to twist on connectors. My previous experience (at another company), during a product review by a European notified body required us to replace twist on connectors with crimp on type. To further complicate matters there is an IEC standard for twist on connectors, IEC-60998-2-4. My question is: are twist on type connectors allowed for this type of equipment in Europe? Is there any standard or guide lines that I could refer to? Most standards that I have reviewed, only state that the connection must be reliable. So if there is an IEC standard for twist on connectors, and these connectors meet that standard, would not they be considered reliable? Thank you for your consideration, Ray Russell [email protected]
