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Installation
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
When pumping flammable fluids, the
surge suppressor must be grounded.
Before pumping, ground the system as
explained below. Also read the section
FIRE OR EXPLOSION HAZARD on
page 3.
Polypropylene surge suppressors are not
conductive. Attaching the ground wire to the
grounding lug grounds only the clamp or flange
(see Fig. 1). When pumping conductive flammable
fluids, always ground the entire fluid system by
making sure the fluid has an electrical path to a
true-earth ground.
To reduce the risk of static sparking, ground the surge
suppressor and all other equipment in the pumping
area. Check your local electrical code for detailed
grounding instructions for your area and type of equip-
ment. Ground all of this equipment:
D Surge suppressor: Attach a ground wire to the
grounding lug (2) as shown in Fig. 1. Connect the
clamp end of the ground wire to a true earth
ground. To order a ground wire and clamp, order
Part No. 222011.
NOTE: To connect the ground wire to the surge
suppressor, first remove the copper connector from
the non-clamp end of the ground wire and discard
it, then push the bare wire through the grounding
lug on the surge suppressor.
D Fluid supply container: Follow your local code.
Fig. 1
23
2
NOTE: When pumping conductive flammable fluids
with a surge suppressor, always ground the entire
fluid system. See the WARNING at left. Fig. 2
shows recommended methods of grounding fluid
containers during filling. These are only guides;
contact your Graco distributor for assistance in
grounding your system.
D Air compressor: Follow the manufacturer’s
recommendations.
D Solvent pails used when flushing: Follow your local
code. Use only grounded metal pails, which are
conductive. Do not place the pail on a
non-conductive surface, such as paper or
cardboard, which interrupts the grounding
continuity.