Woodstock W1808, W1810, W1809 owner manual System Grounding, Flex-hose grounded to

W1808/W1809/W1810 Cyclone Dust Collectors

System Grounding

OPERATIONS

Since plastic hose is abundant, relatively inexpensive, eas- ily 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 connect the woodworking machine to the dust collector. 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 available to prevent static elec- trical build up, the electrical charge will arc to the near- est 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 electric service panel.

If you connect the dust collector to more than one machine by way of a non-conducting branching duct sys- tem and blast gates, the system must still be grounded as mentioned above. We recommend inserting a continu- ous bare copper ground wire (Figure 55) 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 connect 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 grounding wire must be jumped (Figure 56) around the blast gate without inter- ruption 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 wood- working machine and attach to the dust collector frame with a ground screw as shown in Figure 55. Ensure that each machine is continuously grounded to the grounding terminal in your electric service panel.

Always guard against static electrical build up by grounding all dust collec- tion lines.

Internal	External
Ground	Ground Wire
Wire
Flex	Ground Screw
Hose
Figure 55. Flex-hose grounded to
	machine.

Plastic

Blast

Gate

Copper	Metal Duct
Ground Wire

Figure 56. Ground jumper wire when using

plastic blast gates and metal duct.

-36-