# 30 CFR 75.601-1 — Short circuit protection; ratings and settings of circuit breakers.

- **Chapter:** CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
- **Subchapter:** SUBCHAPTER O—COAL MINE SAFETY AND HEALTH
- **Part:** PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
- **Subpart:** Subpart G—Trailing Cables
- **Snapshot current through:** 2026-08-19
- **Official eCFR:** https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-G/section-75.601-1

## Current public text

Circuit breakers providing short circuit protection for trailing cables shall be set so as not to exceed the maximum allowable instantaneous settings specified in this section; however, higher settings may be permitted by an authorized representative of the Secretary when he has determined that special applications are justified:

Conductor size AWG or MGM Maximum allowable circuit breaker instantaneous setting (amperes) 14 50 12 75 10 150 8 200 6 300 4 500 3 600 2 800 1 1,000 1/0 1,250 2/0 1,500 3/0 2,000 4/0 2,500 250 2,500 300 2,500 350 2,500 400 2,500 450 2,500 500 2,500

## Provenance

- Source: Electronic Code of Federal Regulations, Title 30
- Representation: Realm public-data crosswalk
- Legal status: The eCFR is an editorial compilation; consult the official source before relying on the text.