30 CFR 57.6407
§ 57.6407 Circuit testing.
United States · 30 CFR — Mineral Resources · Status: effective
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- Citation
- 30 CFR 57.6407, § 57.6407 Circuit testing, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/132809
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Full text
A blasting galvanometer or other instrument designed for testing blasting circuits shall be used to test the following:
(a) In surface operations—
(1) Continuity of each electric detonator in the blasthole prior to stemming and connection to the blasting line;
(2) Resistance of individual series or the resistance of multiple balanced series to be connected in parallel prior to their connection to the blasting line;
(3) Continuity of blasting lines prior to the connection of electric or electronic detonator series; and
(4) Total blasting circuit resistance prior to connection to the power source.
(b) In underground operations—
(1) Continuity of each electric detonator series; and
(2) Continuity of blasting lines prior to the connection of electric or electronic detonators.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.