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Generac ® Power Systems, Inc. 3
• Inspect the generator regularly, and promptly
repair or replace all worn, damaged or defective
parts using only factory-approved parts.
• Before performing any maintenance on the genera-
tor, disconnect its battery cables to prevent acci-
dental start-up. Disconnect the cable from the bat-
tery post indicated by a NEGATIVE, NEG or (–)
first. Reconnect that cable last.
• Never use the generator or any of its parts as a
step. Stepping on the unit can stress and break
parts, and may result in dangerous operating con-
ditions from leaking exhaust gases, fuel leakage,
oil leakage, etc.
ELECTRICAL HAZARDS
• All generators covered by this manual produce dan-
gerous electrical voltages and can cause fatal elec-
trical shock. Utility power delivers extremely high
and dangerous voltages to the transfer switch as
well as the standby generator. Avoid contact with
bare wires, terminals, connections, etc., on the gen-
erator as well as the transfer switch, if applicable.
Ensure all appropriate covers, guards and barriers
are in place before operating the generator. If you
must work around an operating unit, stand on an
insulated, dry surface to reduce shock hazard.
• Do not handle any kind of electrical device while
standing in water, while barefoot, or while hands
or feet are wet. DANGEROUS ELECTRICAL
SHOCK MAY RESULT.
• If people must stand on metal or concrete while
installing, operating, servicing, adjusting or repair-
ing this equipment, place insulative mats over a
dry wooden platform. Work on the equipment only
while standing on such insulative mats.
• The National Electrical Code (NEC), Article 250
requires the frame and external electrically con-
ductive parts of the generator to be connected to an
approved earth ground and/or grounding rods.
This grounding will help prevent dangerous elec-
trical shock that might be caused by a ground fault
condition in the generator set or by static electric-
ity. Never disconnect the ground wire.
• Wire gauge sizes of electrical wiring, cables and
cord sets must be adequate to handle the maxi-
mum electrical current (ampacity) to which they
will be subjected.
• Before installing or servicing this (and related)
equipment, make sure that all power voltage sup-
plies are positively turned off at their source.
Failure to do so will result in hazardous and pos-
sibly fatal electrical shock.
• Connecting this unit to an electrical system nor-
mally supplied by an electric utility shall be by
means of a transfer switch so as to isolate the gen-
erator electric system from the electric utility dis-
tribution system when the generator is operating.
Failure to isolate the two electric system power
sources from each other by such means will result
in damage to the generator and may also result in
injury or death to utility power workers due to
backfeed of electrical energy.
• Generators installed with an automatic transfer
switch will crank and start automatically when
normal (utility) source voltage is removed or is
below an acceptable preset level. To prevent such
automatic start-up and possible injury to person-
nel, disable the generator’s automatic start circuit
(battery cables, etc.) before working on or around
the unit. Then, place a “Do Not Operate” tag on the
generator control panel and on the transfer switch.
• In case of accident caused by electric shock,
immediately shut down the source of electrical
power. If this is not possible, attempt to free the
victim from the live conductor. AVOID DIRECT
CONTACT WITH THE VICTIM. Use a noncon-
ducting implement, such as a dry rope or board, to
free the victim from the live conductor. If the victim
is unconscious, apply first aid and get immediate
medical help.
• Never wear jewelry when working on this equip-
ment. Jewelry can conduct electricity resulting in
electric shock, or may get caught in moving com-
ponents causing injury.
FIRE HAZARDS
• Keep a fire extinguisher near the generator at all
times. Do NOT use any carbon tetra-chloride type
extinguisher. Its fumes are toxic, and the liquid can
deteriorate wiring insulation. Keep the extinguish-
er properly charged and be familiar with its use. If
you have any question pertaining to fire extin-
guishers, consult your local fire department.
EXPLOSION HAZARDS
• Properly ventilate any room or building housing
the generator to prevent build-up of explosive gas.
• Do not smoke around the generator. Wipe up any
fuel or oil spills immediately. Ensure that no com-
bustible materials are left in the generator com-
partment, or on or near the generator, as FIRE or
EXPLOSION may result. Keep the area surround-
ing the generator clean and free from debris.
• Generac generator sets may operate using one of
several types of fuels. All fuel types are potentially
FLAMMABLE and/or EXPLOSIVE and should be
handled with care. Comply with all laws regulating
the storage and handling of fuels. Inspect the unit’s
fuel system frequently and correct any leaks
immediately. Fuel supply lines must be properly
installed, purged and leak tested according to
applicable fuel-gas codes before placing this equip-
ment into service.
• Diesel fuels are highly FLAMMABLE. Gaseous flu-
ids such as natural gas and liquid propane (LP)
gas are extremely EXPLOSIVE. Natural gas is
lighter than air, and LP gas is heavier than air;
install leak detectors accordingly.
Important Safety Instructions
Generac Standby Generator Sets