Compliance
22 NGT Transceiver System Technical Service Manual
Electrical safety
To ensure compliance with the European Low Voltage Directive is maintained, you must
install and use the NGT series Transceiver in accordance with the instructions in the
relevant NGT Transceiver Getting Started Guide and NGT Transceiver Reference
Manual.
When using equipment that is connected directly to the AC mains, these precautions
must be followed and checked before applying AC power to the unit:
1 Use the standard AC mains cable supplied.
1 Ensure the covers for the equipment are fitted correctly.
Earth symbols
Chassis earth connection points are provided on the NGT series Transceiver and
3020 Transceiver Supply. A protective earth is provided in the AC mains wiring of the
3020 Transceiver Supply. This protective earth must be connected at the AC mains
supply outlet. The symbols shown in Table 1 are used to identify the earths on the
equipment.
CAUTION
If it is necessary for a qualified electronics technician to remove the
covers during servicing, they must be refitted correctly before using
the equipment.
WARNING
A protective earth connection must be included in the mains wiring to
the 3020 Transceiver Supply (see below, Earth symbols).
The protective cover must always be fitted when the
3020 Transceiver Supply is connected to the AC mains.
Table 1: Earth symbols
Symbol Meaning
Chassis earth
Protective earth
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