CFR › Title 30 › Part 7 › §7.6830 CFR §7.68Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(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.