30 CFR 57.6403 - Branch circuits.

§ 57.6403 Branch circuits.
(a) If electric blasting includes the use of branch circuits, each branch shall be equipped with a safety switch or equivalent method to isolate the circuits to be used.
(b) At least one safety switch or equivalent method of protection shall be located outside the blast area and shall be in the open position until persons are withdrawn.

Title 30 published on 2013-07-01

no entries appear in the Federal Register after this date.

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