30 CFR § 75.601-3 - Short circuit protection; dual element fuses; current ratings; maximum values.

---
identifier: "/us/cfr/t30/s75.601-3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 75.601-3 - Short circuit protection; dual element fuses; current ratings; maximum values."
title_number: 30
title_name: "Mineral Resources"
section_number: "75.601-3"
section_name: "Short circuit protection; dual element fuses; current ratings; maximum values."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "O"
subchapter_name: "COAL MINE SAFETY AND HEALTH"
part_number: "75"
part_name: "MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 811, 813(h), 957."
regulatory_source: "35 FR 17890, Nov. 20, 1970, unless otherwise noted."
cfr_part: "75"
---


# 75.601-3 Short circuit protection; dual element fuses; current ratings; maximum values.

Dual element fuses having adequate current-interrupting capacity shall meet the requirements for short circuit protection of trailing cables as provided in § 75.601, however, the current ratings of such devices shall not exceed the maximum values specified in this section:

|  |  |  |  |  |
| --- | --- | --- | --- | --- |
| 14 |  |  | 15 | 15 |
| 12 |  |  | 20 | 20 |
| 10 |  |  | 25 | 25 |
| 8 | 60 | 60 | 50 | 50 |
| 6 | 85 | 90 | 65 | 70 |
| 4 | 110 | 110 | 90 | 90 |
| 3 | 130 | 150 | 105 | 110 |
| 2 | 150 | 150 | 120 | 125 |
| 1 | 170 | 175 | 140 | 150 |
| 1/0 | 200 | 200 | 170 | 175 |
| 2/0 | 235 | 250 | 195 | 200 |
| 3/0 | 275 | 300 | 225 | 225 |
| 4/0 | 315 | 350 | 260 | 300 |
| 250 | 350 | 350 | 285 | 300 |
| 300 | 395 | 400 | 310 | 350 |
| 350 | 445 | 450 | 335 | 350 |
| 400 | 480 | 500 | 360 | 400 |
| 450 | 515 | 600 | 385 | 400 |
| 500 | 545 | 600 | 415 | 450 |