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Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum ( )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

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Original Message:

Posted by: Juan C. Rodenas ( )
Date posted: Mon Jul 16 7:24:48 US/Eastern 2001
Subject: reliability data
I am trying to calculate MTBF for a cable assembly. This assembly will be composed of electrical wires (normal wires, flat wires for computer, etc) and 2 connectors. Usinga Part count method it can be obtained taken the connector failure data from MIL-HDBK-217 and here come the problem. I havenīt found any data about wires reliability. Looking at NPRD-95 I am not sure if any values there can be used. Any help will be welcomed.


Subject: Electrical Wire Reliability
Reply Posted by: Bruce Dudley ( )
Organization: Reliability Analysis Center
Date Posted: Mon Jul 16 13:52:38 US/Eastern 2001
I used the RAC CD ROM data base for electronic and non-electronic parts and I found several source of reliability data for electrical wires. These sources included: Cable, Electrical Lead with a failure rate of 0.04 failures per million hours at a ground benign condition, and Cable Assembly, Flat Ribbon with a failure rate of 0.08 failures per million hours at a ground benign condition. These rates could be translated to other environmental conditions by using the tables in the Reliability Toolkit.

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