-36-
Model G0860/G0861/G0862 (Mfd. Since 10/18)
System Grounding
Since plastic hose is abundant, relatively inex-
pensive, easily assembled and air tight, it is a
very popular material for conveying dust from
woodworking machines to the dust collector. We
recommend using flexible hose (flex-hose) to con-
nect the woodworking machine to the dust collec-
tor. However, plastic flex-hose and plastic duct are
an insulator, and dust particles moving against the
walls of the plastic duct create a static electrical
build up. This charge will build until it discharges
to a ground. If a grounding medium is not avail-
able to prevent static electrical build up, the
electrical charge will arc to the nearest grounded
source. This electrical discharge may cause an
explosion and subsequent fire inside the system.
To protect against static electrical build up inside
a non-conducting duct, a bare copper wire should
be placed inside the duct along its length and
grounded to the dust collector. You must also
confirm that the dust collector is continuously
grounded through the electrical circuit to the elec-
tric service panel.
If you connect the dust collector to more than one
machine by way of a non-conducting branching
duct system and blast gates, the system must still
be grounded as mentioned above. We recom-
mend inserting a continuous bare copper ground
wire inside the entire duct system and attaching
the wire to each grounded woodworking machine
and dust collector.
Be sure that you extend the bare copper wire down
all branches of the system. Do not forget to con-
nect the wires to each other with wire nuts when
two branches meet at a “Y” or “T” connection.
Ensure that the entire system is grounded. If using
plastic blast gates to direct air flow, the ground-
ing wire must be jumped (see the figure below)
around the blast gate without interruption to the
grounding system.
We also recommend wrapping the outside of all
plastic ducts with bare copper wire to ground the
outside of the system against static electrical build
up. Wire connections at Y’s and T’s should be
made with wire nuts.
Attach the bare ground wire to each stationary
woodworking machine and attach to the dust
collector frame with a ground screw as shown
in the figure
below. Ensure that each machine is
continuously grounded to the grounding terminal
in your electric service panel.
External
Ground Wire
Internal
Ground Wire
Flex-Hose
Ground
Screw
Figure 55. Flex-hose grounded to machine.
Plastic Blast
Gate
Copper
Ground Wire
Metal Duct
Figure 54. Ground jumper wire when using
plastic blast gates and metal duct.
Always guard against stat-
ic electrical build up by
grounding all dust collec-
tion lines.
