Panasonic KX-TDA100 Installation Manual

Also see for HYBRID IP-PBX KX-TDA100: User guide User guide Technical information Technical information Features guide

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Panasonic KX-TDA100 Installation Manual Manual pdf 48 page image

2.2 Installation of the Hybrid IP-PBX48 Installation Manual2.2.5 Frame Ground ConnectionIMPORTANTConnect the frame of the Hybrid IP-PBX to ground.• Be sure to comply with applicable local regulations (e.g., laws, guidelines).• Proper grounding (connection to ground) is very important to protect the Hybrid IP-PBX from the badeffects of external noise or to reduce the risk to the user of electrocution in the case of a lightning strike.• The ground wire of the AC cable has an effect against external noise and a lightning strikes, but it maynot be enough to protect the Hybrid IP-PBX. A permanent connection between ground and the groundterminal of the Hybrid IP-PBX must be made.In most of the continental United States, the ground provided by the "Third wire ground" at the commercialpower outlet will be satisfactory. However, in a small percentage of cases this ground may be installedincorrectly. Therefore, the following test procedure should be performed.Test Procedure1. Obtain a suitable voltmeter and set it for a possible reading of up to 250 V AC.2. Connect the meter probes between the 2 main AC voltage points on the wall outlet. The readingobtained should be 108 V AC to 132 V AC.3. Move one of the meter probes to the 3rd prong terminal (GND).Either the same reading or a reading of 0 volt should be obtained.4. If a reading of 0 volt at one terminal and a reading of 108 V AC to 132 V AC at the other terminalis not obtained, the outlet is not properly grounded.This condition should be corrected by a qualified electrician (per article 250 of the NationalElectrical Code).5. If a reading of 0 volt at one terminal and a reading of 108 V AC to 132 V AC at the other terminalis obtained, then set the meter to the "OHMS/RX1" scale, place one probe at the GND Terminaland the other probe at the terminal which gave a reading of 0 volt.A reading of less than 1 ohm should be obtained. If the reading is not obtained, the outlet is notadequately grounded. See qualified electrician.1. Loosen the screw.2. Insert a grounding wire (user-supplied)*.3. Tighten the screw.4. Connect the grounding wire toground.* For grounding wire, green-and-yellow insulation is required, and the cross-sectional area of theconductor must be more than 0.75 mm 2 or 18 AWG.ScrewTo GroundGroundingwire