Michael, I don't know of any code section covering this question. Provided the terminal is of a "V" Notch or Saddle type construction the two dis-similar wires will be securely clamped - to the terminal, and to each other. However a Parallel Jaw type vyce grip terminal or a Round Hole w/ Small Dia. Screw would obviously not provide a secure connection and should be rejected. Regards, Tony Firth, EE, Genus, Inc. Sunnyvale,CA
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
