ADTRAN 6250 Installation Guide download pdf (Page 27)

NetVanta 6240/6250 Series HIG Unit Installation

Supplying Power to the Unit

The NetVanta 6240/6250 Series units come equipped with a 120 VAC, 60 Hz power supply for connecting to a

properly grounded power receptacle. (A detachable power cable with a grounded, three-prong plug comes with

the shipment.) To power this unit, connect the power cable to an appropriate AC power source.

Supplying DC Power to the NetVanta 6250

The NetVanta 6250 can also be connected to a centralized DC power source via the two-position terminal block

connector (DC IN) located on the rear of the chassis (see Figure 6 on page 28). Power and ground connections

require copper conductors and a ring lug.

• In addition to the equipment earthing conductor in the power supply cord, a

supplementary equipment earthing conductor is to be installed between the system and

earth.

• The supplemental earthing conductor shall be connected to the equipment using a

number 8 ring terminal and should be fastened to the grounding lug provided on the

rear panel of the equipment. The ring terminal should be installed using the

appropriate crimping tool (AMP P/N 59250 T-EAD Crimping Tool or equivalent).

• The supplementary equipment earthing conductor must not be smaller in size than

cross-sectional area of not less than 2.5 mm

, if mechanically protected. The

supplementary equipment earthing conductor is to be connected to the product at the

terminal provided, and connected to earth in a manner that will retain the earth

connection when the power supply cord is unplugged. The connection to earth of the

supplementary earthing conductor must be in compliance with the appropriate rules for

terminating bonding jumpers in Part K of Article 250 of the National Electrical Code,

ANSI/NFPA 70, and Article 10 of Part 1 of the Canadian Electrical Code, Part 1,

C22.1. Termination of the supplementary earthing conductor is permitted to be made

to building steel, to a metal electrical raceway system, or to any earthed item that is

permanently and reliably connected to the electrical service equipment earthed.

• Bare, covered, or insulated earthing conductors are acceptable. A covered or insulated

conductor must have a continuous outer finish that is either green, or green with one or

more yellow stripes.

• A readily accessible disconnect device, that is suitably approved and rated, shall be

incorporated in the field wiring.

• Maximum recommended ambient operating temperature is 50

°C.

ADTRAN does not recommend using the optional battery backup unit when the

NetVanta 6250 is being powered from a DC source.

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ADTRAN 6250 Installation Guide Page 27