Grounding
Grounding
Grounding
The equipment must be grounded to reduce the
risk of static sparking and electric shock. Electric
or static sparking can cause fumes to ignite or
explode. Improper grounding can cause electric
shock. Ground all equipment, personnel, objects
being sprayed, and conductive objects in or close
to the spray area. The resistance must not exceed
1 megohm. Grounding provides an escape wire
for the electric current.
When operating the electrostatic gun, any
ungrounded objects (such as people, containers, and
tools) in the spray location can become electrically
charged.
The following are minimum grounding requirements
for a basic electrostatic system. Your system may
include other equipment or objects which must be
grounded. Your system must be connected to a
true earth ground. Check ground connections daily.
Check your local electrical codes and regulations for
detailed grounding instructions.
•
All persons entering the spray area:
must wear
shoes having conductive soles such as leather,
or wear personal grounding straps. Do not
wear shoes with non-conductive soles such as
rubber or plastic. If gloves are necessary, wear
the conductive gloves supplied with the gun. If
non-Graco gloves are worn, cut off fingers or palm
area of gloves to ensure your hand contacts the
grounded gun handle. Conductive gloves and
footwear must not exceed 100 megohm per EN
ISO 20344, EN 1149–5.
•
Object being sprayed:
Keep the workpiece hangers
clean and grounded at all times.
•
Electrostatic Air-Assisted Spray Gun:
Ground
the gun by connecting the Graco Grounded
Air Hose to the gun, and connecting the air
hose ground wire to a true earth ground. See
Check Gun Electrical Grounding, page 24
•
Pump/fluid source:
Ground the pump/fluid source
by connecting its ground wire to a true earth
ground.
•
All electrically conductive objects or devices in the
spray area:
must be properly grounded.
•
Fluid and waste containers:
Ground all fluid and
waste containers in the spray area. Do not use pail
liners unless they are conductive and grounded.
When flushing the spray gun, the container used
to catch the excess fluid must be electrically
conductive and grounded.
•
Air compressors:
Ground the equipment according
to the manufacturer's recommendations.
•
All air and fluid lines
must be properly grounded.
Use only grounded hoses with a maximum of 100
feet (30.5 m) combined hose length to ensure
grounding continuity
•
The floor of the spray area:
must be electrically
conductive and grounded. Do not cover the floor
with cardboard or any non-conductive material
which would interrupt grounding continuity
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