W-S-896F
3.6.3 Canadian Standards Association (CSA) listing mark. Switches which have been certified by Canadian Standards Association shall have the listing mark on each switch and shall be plainly visible when the switch is installed.
3.7 Workmanship. Switches shall be processed in such a manner as to be uniform in quality and shall be free from loose terminals, cracked or displaced parts, sharp edges, burrs, chips, and other defects that will affect life, serviceability, or appearance.
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements.
4.1.1 Test equipment and inspection facilities. Test equipment and inspection facilities shall be of sufficient accuracy, quality and quantity to permit performance of the required inspection. The supplier shall establish calibration of inspection equipment to the satisfaction of the Government. Compliance with the requirements of ANSI/NCSL Z540-1, ISO 10012-1 or approved equivalent.
4.2 Classification of examinations and tests. The examinations and tests specified herein are classified as follows:
a. Qualification inspection (see 4.3).
b. Quality conformance inspection (.see 4.4).
4.3 Qualification inspection. Those switches which meet the inspection in 4.3.1 shall be considered qualified for inclusion on the qualified products list. Qualification inspection shall be performed at any laboratory acceptable to the Government (see 6.5) on sample units produced with equipment and procedures normally used in production.
4.3.1 Inspection routine. Switches shall be subjected to the inspection and test specified in UL 20, except the endurance test shall be in accordance with 3.5. Sample size, character of failures, and number of failures permitted shall be as specified by UL or CSA inspection procedures. Products which have been so certified by Underwriters' Laboratories or Canadian Standards Association shall be considered suitable for inclusion on the qualified products list.
4.3.2 Retention of qualification. The supplier shall forward to the preparing activity at 12-month intervals certification signed by a responsible official of management, attesting that the listed product(s) is still available from the listed plant, can be produced under the same conditions as originally qualified; i.e., same process, materials, construction, design, manufacturer's part number or designation; and meets the requirements of the current issue of the specification. Failure to provide the certification will be cause for removal from the qualified products list. After completion of the certification review, the qualified products list shall be reprinted to show the date of validation. DD Form 1718, Certification of Qualified Products, shall be used for obtaining certification.
4.4 Quality conformance inspection. Quality conformance inspection shall be in accordance with the follow up service program of Underwriters' Laboratories, Inc. or Canadian Standards Association.
4.5 Test methods. Except as otherwise specified herein, the tests and examinations shall be in accordance with UL 20.
4.5.1 Visual examination. Switches shall be examined to verify that the materials, design and construction, physical dimensions, marking, and workmanship are in accordance with the applicable requirements (see 3.1, 3.3, 3.4, 3.6, and 3.7).
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