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Code of Federal Regulations (Last Updated: July 5, 2024) |
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Title 30 - Mineral Resources |
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Chapter I - Mine Safety and Health Administration, Department of Labor |
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SubChapter B - Testing, Evaluation, and Approval of Mining Products |
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Part 7 - Testing by Applicant or Third Party |
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Subpart D - Multiple-Shot Blasting Units |
§ 7.68 - Firing line terminals test.
Latest version.
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§ 7.68 Firing line terminals test.
(a) Test procedures.
(1) The contact resistance through each firing line terminal shall be determined.
(2) A 10-pound pull shall be applied to a No. 18 gauge wire that has been connected to each firing line terminal according to the manufacturer's instructions.
(b) Acceptable performance.
(1) The contact resistance shall not be greater than 1 ohm.
(2) The No. 18 gauge wire shall not become disconnected from either firing line terminal.