30 C.F.R. § 75.601-3 Short circuit protection; dual element fuses; current ratings; maximum values.
Title 30 - Mineral Resources
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:
Title 30: Mineral Resources
PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
Subpart G—Trailing Cables
§ 75.601-3 Short circuit protection; dual element fuses; current ratings; maximum values.
------------------------------------------------------------------------ Single conductor Two conductor cable cable ------------------------------------- Conductor size (AWG or MGM) Max. Max. Ampacity fuse Ampacity fuse rating rating------------------------------------------------------------------------14................................ ........ ....... 15 1512................................ ........ ....... 20 2010................................ ........ ....... 25 258................................. 60 60 50 506................................. 85 90 65 704................................. 110 110 90 903................................. 130 150 105 1102................................. 150 150 120 1251................................. 170 175 140 1501/0............................... 200 200 170 1752/0............................... 235 250 195 2003/0............................... 275 300 225 2254/0............................... 315 350 260 300250............................... 350 350 285 300300............................... 395 400 310 350350............................... 445 450 335 350400............................... 480 500 360 400450............................... 515 600 385 400500............................... 545 600 415 450------------------------------------------------------------------------
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