Grounding - Graco Express 3900 Operation

Grounding

Grounding
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes
to ignite or explode. Grounding provides an escape
wire for the electric current.
To ground sprayer: Attach sprayer grounding clamp to
earth ground.
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Air and fluid hoses: Use only electrically conductive
hoses with a maximum of 500 ft. (150 m) combined
hose length to ensure grounding continuity. Check elec-
trical resistance of hoses. If total resistance to ground
exceeds 29 megohms, replace hose immediately.
Spray gun: Ground through connection to a properly
grounded fluid hose and pump.
Solvent pails used when flushing: Follow local code.
Use only conductive metal pails, placed on a grounded
surface. Do not place the pail on a non-conductive sur-
face, such as paper or cardboard, which interrupts
grounding continuity.
To maintain grounding continuity when flushing or
relieving pressure: Hold metal part of the spray gun
firmly to the side of a grounded metal pail, then trigger
the gun.
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