Michael, The twists per inch are selected to limit crosstalk between pairs. If you don't have a crosstalk requirement you would select the one twist per 6 inches depending your needs. You could also run them with no twist and use tubing or shrink tubing. Fred Miller -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Forrester, Michael (H USA) Sent: Wednesday, July 27, 2011 11:32 AM To: [log in to unmask] Subject: [TN] Wire Twists per inch Does IPC/WHMA-A-620 specify how many twists per inch you should have when you twist the wires in a cable assembly(like a twisted pair) instead of using tie wraps or lacing? I was unable to find anything. Thank you. Best Regards, Michael Forrester Sr. Product Engineer CSMTPE Siemens Healthcare Diagnostics 101 Silvermine Rd. Brookfield, CT 06804 PH: (203) 740-6452 ------------------------------------------------------------------------ ------- This message and any included attachments are from Siemens Healthcare Diagnostics and are intended only for the addressee(s). The information contained herein may include trade secrets or privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. If you received this message in error, or have reason to believe you are not authorized to receive it, please promptly delete this message and notify the sender by e-mail with a copy to [log in to unmask] ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- This e-mail message and any attachments may contain confidential information from Astrolab Inc. If you are not the intended recipient, you are hereby notified that disclosure, printing, copying, distribution, or the taking of any action in reliance on the contents of this electronic information is strictly prohibited. If you have received this e-mail message in error, please immediately notify the sender by reply message and then delete the electronic message and any attachments. Thank you for your cooperation. ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------