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|  DOE-HDBK-1092-2004
5.9.2
FEATURES AND TEST CRITERIA ...............................................................................5-29
5.10
UNDERGROUND FACILITIES ................................................................................................5-29
5.10.1
WORK ON ELECTRICAL EQUIPMENT AND CIRCUITS .............................................5-30
5.10.2
GROUNDING.................................................................................................................5-31
5.10.3
POWER CABLES AND CONDUCTORS.......................................................................5-31
5.10.4
TRAILING CABLES .......................................................................................................5-32
5.10.5
TROLLEY CIRCUITS FOR TRACK HAULAGE ............................................................5-32
6.0
REQUIREMENTS FOR SPECIFIC EQUIPMENT ........................................................................6-1
6.1
CONVEYING SYSTEMS ...........................................................................................................6-1
6.1.1
ELECTRICAL DESIGN CRITERIA ..................................................................................6-1
6.2
CRANES AND HOISTS .............................................................................................................6-2
6.2.1
NEC GENERAL REQUIREMENTS .................................................................................6-2
6.2.2
DISCONNECTING MEANS .............................................................................................6-3
6.2.3
GROUNDING...................................................................................................................6-4
6.2.4
CONTROL........................................................................................................................6-4
6.2.5
CLEARANCES.................................................................................................................6-5
6.2.6
OSHA AND NEC REQUIREMENTS................................................................................6-5
6.2.7
MAINTENANCE AND OPERATIONS..............................................................................6-5
6.2.8
DOCUMENTED MAINTENANCE ....................................................................................6-5
6.2.9
MECHANICAL ELEVATING AND ROTATING EQUIPMENT .........................................6-6
6.3
ELEVATORS AND ESCALATORS............................................................................................6-7
6.3.1
CODES AND STANDARDS ............................................................................................6-7
6.3.2
DESIGN SPECIFICATIONS ............................................................................................6-7
6.3.2.1
VOLTAGE AND CURRENT LIMITATIONS.................................................................6-7
6.3.2.2
CONDUCTORS ...........................................................................................................6-8
6.3.2.3
DISCONNECTING MEANS.........................................................................................6-8
6.3.2.4
MOTORS .....................................................................................................................6-9
6.3.2.5
GROUNDING ..............................................................................................................6-9
6.3.2.6
OVERSPEED PROTECTION......................................................................................6-9
6.3.3
EMERGENCY POWER ...................................................................................................6-9
6.3.4
DESIGN ...........................................................................................................................6-9
6.3.5
FIRE PROTECTION ......................................................................................................6-10
6.3.6
INSPECTIONS AND RECORDS ...................................................................................6-11
6.3.6.1
CODES ......................................................................................................................6-11
6.3.6.2
INSPECTOR QUALIFICATIONS...............................................................................6-11
6.4
PORTABLE AND VEHICLE-MOUNTED GENERATORS .......................................................6-11
6.5
BATTERIES .............................................................................................................................6-12
viii
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