Exhaust System; Electrical Grounding - Omtech USB3020B User Manual

3.5 Exhaust System Installation
Install the provided exhaust pipe on the fan, as shown below. The pipe can be expanded to a full length of
about 5 feet (1.5 m). The other end of the pipe should be connected to a dedicated purifier or (if the fumes
are not harzardous and meet local and national air safety standards) placed out a window.
NEVER operate the machine in a closed room and NEVER operate the laser if the vent is not purifying or
removing the fumes produced by the target material. Research materials before use and never operate the
laser on any (such as PVC, teflon, or other halogen-containing substances) that can produce corrosive,
hazardous, or even deadly fumes.

3.6 Electrical Grounding

This device employs a powerful laser. As discussed in the Safety Information above, it is extremely high voltage
and potentially dangerous, so users must securely ground it to avoid the buildup of static electricity. Using a standard
3-prong outlet will provide sufficient grounding. If you do not have access to a 3-prong outlet, you MUST use the
grounding cable and ensure its proper connection. The far end of the cable should be securely connected to a metal
rod driven at least 8 feet (3 m) deep into soil located at least 5 feet (1.5 m) from the machine. The resistance along
the line should be no greater than 5Ω.
Poor grounding WILL cause equipment failure and create a serious electrical shock hazard. The manufacturer
and/or seller bear(s) no responsibility and assume(s) no liability for any damage, accidents, or injuries
caused by bad grounding connections.
Solid Bar
Ground
8 Feet (3 m)
14
Cable