Hi Don,
IPC-A-610C, IPC-A-620, and J-STD-001C have criteria for Pierced tab wrap and
soldering.
There is minor variation in the content of 620 when compared to the other
two standards which are consistent.

In general for a target condition these state:
Wire passes through the eye
Wrapped to contact two sides of the terminal
Insulation clearance, but less than 2 wire diameters
The number of wire attachments for this terminal is not addressed but there
are restrictions on modification of the wires to permit the attachment.

Mel Parrish
Madison, AL
256 705 5530
256 705 5538 Fax
[log in to unmask]
www.solderingtech.com

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Donald
Vischulis
Sent: Monday, June 02, 2003 10:59 AM
To: [log in to unmask]
Subject: [TN] Soldering Wires


I tried posting this on Friday and received no answers.  I'll try rephrasing
in hope that somebody has run into this situation before.

Our company has received switches with a different termination from what we
are accostomed to receiving.  These switches have holes in a flat tab rather
than a 'T' shaped termination.  We are trying to determine how many wires
can pass through the hole. Is there a maximum percent of fill?  Is the
recommended attachment method to twist and tin the wires before attaching to
the switch?  Are there any standards that cover this situation?

Any guidance is appreciated.

Don Vischulis

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