30 CFR § 7.62 - Definitions.

---
identifier: "/us/cfr/t30/s7.62"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 7.62 - Definitions."
title_number: 30
title_name: "Mineral Resources"
section_number: "7.62"
section_name: "Definitions."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "B"
subchapter_name: "TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS"
part_number: "7"
part_name: "TESTING BY APPLICANT OR THIRD PARTY"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 957."
regulatory_source: "53 FR 23500, June 22, 1988, unless otherwise noted."
cfr_part: "7"
---


# 7.62 Definitions.

The following definitions apply in this subpart:

*Blasting circuit.* A circuit that includes one or more electric detonators connected in a single series and the firing cable used to connect the detonators to the blasting unit.

*Blasting unit.* An electric device used to initiate electric detonators.

*Normal operation.* Operation of the unit according to the manufacturer's instructions with fully-charged batteries, with electric components at any value within their specified tolerances, and with adjustable electric components set to any value within their range.