Mike, for Class 2 wiring terminals, it is not an NEC issue; rather it is a Listing issue. We just today went through this same conversation about two wires inserted into a Class 2 field wiring terminal. We determined, and it was verified by our Listing agency, that we can insert two wires into a terminal if it can be demonstrated that there will be no hazard if one wire is not captured, becomes loose and is free to move about - e.g., short to a hazardous circuit. A secondary retaining method may be necessary. Our Listing agency will not allow two wires in a Class 1 field wiring terminal. Richard Woods Sensormatic Electronics Tyco International
-----Original Message----- From: Michael Taylor [mailto:[email protected]] Sent: Wednesday, May 08, 2002 1:15 PM To: [email protected] Subject: NEC Wiring Question Greetings all, An issue came up in a product 61010 safety evaluation and no one here can remember if you can / can't do it. Does anyone out in Cyberland know if the NEC allows 2 wires of different sizes (awg) to be clamped together in a clamping type PC mounted wiring terminal. The wire is striped bare & inserted into a slot on the side of a terminal block that has a screw on top for tightening. I seem to remember the code does not allow wires of different gauges to be clamped together under a single compression clamping terminal. I have searched the NEC and can't find anything on this. Can anyone remember chapter & verse on this issue. If I'm wrong, please be kind, the 60 hour weeks are getting to us. Thanks in advance Michael Taylor Colorado
