sure is! While I am not expert, I have installed many networks over the years and the twists can be very important from one set of wires to another to cancel out cross-talk as well as other things (attenuation, frequency) Not knowing what kind of cabling you are talking about or (more importantly- what you are doing with the cabling)- all I can say is yes- there are different twist rate standards in twisted pair cabling. I dont know them, but I am sure the are out there. For example- remove the outer sheathing on common cat5, cat5e, or cat6 network cabling and you will see different twist rates between the pairs. doing a quick look- here's a site that happens to show the different twist rates between the inside 4 pairs in one cat5 cable. http://www.jimhayes.com/uncleted/cables.html See the color pic showing the 4 pairs? - If you look closely- there are 4 different twist rates- one for each pair so they dont crosstalk between them. Lenny Carter Design Engineer ERG, Inc. www.ergpower.com ----- Original Message ----- From: "Phil Nutting" <[log in to unmask]> To: <[log in to unmask]> Sent: Tuesday, December 11, 2007 10:06 AM Subject: [TN] twists per inch Is there any standard on the number of twists per inch for twisted pair wire? Thanks in advance. Phil Nutting --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------