{"data":{"id":"us/30-cfr-7.65","jurisdiction":"us","citation":"30 CFR 7.65","heading":"Critical characteristics.","body":"The following critical characteristics shall be inspected or tested on each blasting unit to which an approval marking is affixed:\n(a) The output current.\n(b) The voltage cut-off time.\n(c) The components that control voltage and current through each making and breaking electric contact.\n(d) Operation of the visual indicator and the firing switch.","path":["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"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"64bffcd26aa7b20446081c159220e9180a541143393714042fbca4072f890006","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-7.64","next":"us/30-cfr-7.66"},"notice":"GroundRules: Original legal text. Not legal advice."}