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Code of Federal Regulations Title 30. Mineral Resources § 30.7.69 Approval marking

Current as of October 02, 2022 | Updated by FindLaw Staff

Each approved blasting unit shall be identified as permissible by a legible and permanent marking securely attached, stamped, or molded to the outside of the unit. This marking shall include the following:

(a) The assigned MSHA approval number.

(b) The maximum blasting circuit resistance.

(c) A warning that the unit's components must not be disassembled or removed.

(d) The replacement battery types if the unit has replaceable batteries.

(e) A warning placed next to the charging connector that the battery only be charged in a fresh air location if rechargeable batteries are used.

(f) A warning that the unit is compatible only with detonators that will—

(1) Fire when an average of 1.5 amperes is applied for 5 milliseconds;

(2) Not misfire when up to an average 100 amperes is applied for 10 milliseconds;  and

(3) Not fire when a current of 250 milliamperes or less is applied.

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Cite this article: FindLaw.com - Code of Federal Regulations Title 30. Mineral Resources § 30.7.69 Approval marking - last updated October 02, 2022 | https://codes.findlaw.com/cfr/title-30-mineral-resources/cfr-sect-30-7-69/

Read this complete Code of Federal Regulations Title 30. Mineral Resources § 30.7.69 Approval marking on Westlaw

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