One more comment:
The values in IPC are developed to make sure solder will "wick" into the hole during the soldering operation. It is based on the surface tension and "capillary action" of molten solder, but as a general rule the hole is usually around 11-14 mils larger than the lead.
There is nothing that says an oval lead needs an oval hole. As long as you have a hole barely larger enough to insert the "dual" lead, there will still be plenty of space for the capillary action to occur. So, it may be cheaper just to use round holes. Just a thought...

Best wishes,
Jack

                -----Original Message-----
                From:   Richard Hawkins [mailto:[log in to unmask]]
                Sent:   Friday, June 16, 2000 11:05 AM
                Subject:        Oval Lead into Oval Hole

                Hello all,

                I am having trouble finding design specs for an oval component lead going
                into an oval hole.  The component is an indictor that is about 25mm in
                diameter and the lead is made by soldering two 16ga wires together.  The
                shape of the lead is more like a rectangle with a full radius at the short
                sides than an oval and the hole in the pcb is the same shape.

                My task is to evaluate a design, that is already in production, to see if it
                should be changed and make recommendations if so.  However, I have not been
                able to find anything in my IPC manuals that approaches this situation.

                My question then, is what guidelines for layout should I use?

                Any help will be appreciated.

                Richard Hawkins