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Connect AC Power and Ground

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Caution! The equipment room AC power and ground wiring must be performed by a qualified electrician. Refer to the DEFINITY Enterprise Communications Server System Description for site requirement information.


Caution! The power circuit must be dedicated to the system and must not be shared with other equipment and must not be controlled by a wall switch. The AC receptacle should not be located under the MDF.


Caution! System grounding must comply with the general rules for grounding contained in Article 250 of the National Electrical Code (NEC), National Fire Protection Agency (NFPA) 70, or the applicable electric code in the country containing the equipment. For more information, refer to Approved Grounds.

For information about connecting AC power and ground, see:

Task List: Connect AC power and ground

Perform these tasks to connect AC power and ground:

  1. Ground AC Load Center 50 ft (15.2 m) or Less from Cabinet or Ground AC Load Center More Than 50 ft (15.2 m) from Cabinet

  2. Connect Battery Leads (J58890CH-1)

  3. Connect Small Battery Holdover or Connect Large Battery Holdover

  4. Connect Shorting Cable to J58890CE-2

  5. Connect AC Power

Power Requirements

DEFINITY System Power Requirements
Maximum DEFINITY UL Rating Label Power Capacity

Vac In

Iac In

Max W In

BTU/Hr

208

24

3245

11071.26

240

21

3276

11177.71

120

40

3120

10645.44

Power Supply Sources (J58890CE-1, J58890CE-2, and J58890CH-1)

The connect AC power and ground procedures apply to the AC-powered PPN and EPN cabinets.

Any of these power sources can supply 60 Hz power to the AC load in Release 5 and later systems:

Either of these power sources can supply 50 Hz power to the AC load in Release 5 and later systems:

AC Power Sources and Plug Type describes the power sources and required AC input power.

AC Power Sources and Plug Type
Power Distribution Unit
Power Sources
Power Input

AC power distribution (J58890CE-1 and J58890CE-2) Multi-Carrier Cabinet

Single-phase 120 VAC with neutral

Single-phase 240 VAC with neutral, or single phase of 3-phase, 208 VAC with neutral

120 VAC, 60 Hz NEMA 5-50R

208-240 VAC, 60 Hz NEMA L14-30R

AC power distribution (J58890CH-1) Multi-Carrier Cabinet

Single-phase 176-264 VAC

200-240 Volts, 50-60 Hz NEMA L6-30R. Installations outside the United States require a receptacle suitable for use in the country of installation.


Note: The type of power required is shown on the cabinet's rear door.

Grounding an AC-Powered System (J58890CE)

Grounding is relatively simple for an AC-powered system. Basically, the cabinets connect to the single-point ground terminal block located at either the AC load center or to a separate single-point ground block wired to the AC load center (or optional AC protector cabinet).


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