Omtech SH-G1390 User Manual page 41

4.6 Connecting to Power Supply
1. Confirm that the labeling beside the power socket at the back of the engraver matches your
local power supply.
2. Connect one end of the power cable to the power socket.
3. Plug the other end of the power cable into a grounded 3-prong outlet or into a surge protector
rated over 2000 J that is itself connected to a grounded outlet. Use a dedicated circuit with no
other devices on it.
If the outlet is not grounded, use the grounding cable and connect it as follows:
a. Fasten the near end of the grounding cable to the ground port at the back of the engraver.
b. Connect the far end of the cable to a single metal rod driven at least 8 feet (2.5 m) deep
or to two separate metal rods driven at least 4 feet (1.2 m) deep into soil located at least
5 feet (1.5 m) from the machine.
Ground
Solid Bar
4. Repeat the same process for the other power cable.
• Fluctuation along the circuit line should be less than 5%. If this is
exceeded, the fuse will blow, which is located in the power socket and
accessible from the exterior.
• DO NOT connect this device to standard extension cords or power strips.
• The powerful laser is extremely high voltage and potentially dangerous,
so users must securely ground the engraver to avoid the buildup of static
electricity.
• 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.
Grounding Cable
8 Feet (2.5 m)
Ground
Solid Bars
34
Grounding Cable
4 Feet (1.2 m)