UFC 3-560-01
6 December 2006
Including change 1, 7 December 2006
fuses is not permitted. Remove fuses only after opening the upstream disconnect
device. Use an insulated fuse puller. Use an insulated fuse puller and PPE in
accordance with Chapter 4.
12-2.5.16 Use properly grounded portable electric tools, particularly in damp locations
or near grounded equipment or piping. Do not open a ground connection to a water
pipe or ground rod until the ground wire has been disconnected at the equipment.
12-3
ROTATING MACHINERY.
12-3.1
Hazards of Rotating Machinery. Ensure guards are provided to protect
workers from accidental contact with live electrical parts, rotating parts, and hot machine
surfaces. Be aware that rotation can loosen grounding connections, hold-down bolts,
and fray flexible or cord connections. Be alert to sparking of brushes and insulation
failures that may cause flame or molten metal to be ejected from open type motors or
generators. Interior electrical work often must be done in close proximity of rotating
electrical equipment such as motors and generators. Do not operate rotating machinery
without protective guards.
12-3.2
Motors and Generators.
12-3.2.1 After work has been performed on circuits to rotating machines, check
direction of rotation.
12-3.2.2 Always take positive steps to ensure that rotating equipment under repair
cannot be set into motion.
12-3.2.3 A megohmmeter (megger) can be used to check insulation of motor and
generating windings using a current of high voltage and low amperage. Never start a
megohm test if there is any external voltage in the test circuit.
12-3.2.4 Follow appropriate mechanical safety precautions if operating a generator,
including:
12-3.2.4.1 Ensure engine coolant is at the proper level and has the proper amount of
antifreeze. Make sure engine lubricant and fuel are at the proper levels. Check hoses
for good condition.
12-3.2.4.2 Ensure engine air requirements for combustion are met. Check air filters and
cleaners for cleanliness and good condition.
12-3.2.4.3 Verify the engine, generator, and related equipment are clean. Keep oil-
soaked rags out of the generating facility to avoid a fire hazard.
12-4
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