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Electrical Surge Warning
In order to help protect equipment against electrical surges please take note of the following
recommendations and guidelines:
1. Earth grounding of all devices is fundamental to ensure long term reliability.
• All electrical equipment must be installed by a qualified, licensed electrician.
• Every power supply that is connected to building power should be earth grounded.
• Earth grounding for the power cable, should be verified to be 0.01 ohm or less.
• Each switch should be grounded to same earth ground as the power supply.
• Each powered device, such as an AP or camera, should be connected to earth ground.
• Each surge suppression device should be connected to earth ground.
2. Shielded cables (STP) offer some minimal level of additional protection over unshielded Ethernet
cables (UTP) but the use of a surge protector is still recommended.
• It is suggested to use STP Cat5e or better for 1Gbps Ethernet switches for any outdoor application
or applications where Ethernet cables come in close proximity to alternating current conductors.
• Always install cables according to manufacturer requirements.
3. For any connections where integrity of the cabling within a building ground is questionable (i.e
outdoor connections), copper Ethernet ports must be connected with an appropriate surge
protection device, inline, between the PSE and PD per the manufacturer’s recommendations for
connection and grounding.
4. Caution should be taken for any cable connected to any outdoor device, not only on the device
grounding, but to ensure that any outdoor device cables that could carry surge currents, do not pass
those surge currents to upstream Ethernet switches.
Caution - Category 5e, Category 6, and Category 6a cables can store large amounts of static
electricity due to the dielectric properties of their construction materials in addition, this build up
of electricity could lead to a Cable Discharge Event (CDE). A CDE can occur due to the differential in
charges on the cable and the equipment it’s being connected to. It is recommended that installers
momentarily ground all copper Ethernet cables (especially in new cable runs) to a suitable and safe
earth ground before connecting them to the port.
Items Included
Depending on your order the following items may be included:
• OmniSwitch Chassis with power supplies and modules
• Country specific power cord(s)
•Cover Panels
• Rack Mount Brackets
• Product Documentation and Training Cards
• DB9-RJ45 Connector
• Grounding Wrist Strap
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