GroundRules
30 CFR 7.68: Firing line terminals test.
Where this section sits in the code
- Title 30—Mineral Resources
- CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
- SUBCHAPTER B—TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS
- PART 7—TESTING BY APPLICANT OR THIRD PARTY
- Subpart D—Multiple-Shot Blasting Units
(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.
Collected 2026-08-27T02:25:24Z. Source file · JSON