Rack Mount Cabinets

Cabinet AC Power Considerations

Cabinet AC Power Considerations

The rack mount cabinet power supply works with either 120VAC, 208VAC or 240VAC. The rack mount only requires 120VAC (up to three cabinets if one AC cord is allowed or five cabinets if two AC cords are allowed – see below).

If the system has more then five cabinets, 208VAC or 240AVC is required for the primary AC power source. 208VAC or 240VAC can always be optionally used for systems with five or less cabinets for future growth or, if the electrical code requires.

To determine AC power requirements, you need to check local electrical code requirements for 120VAC, 208VAC or 240VAC primary power. Some electrical codes stipulate that:

208VAC or 240VAC is required for telephones systems

Only one electrical cord can connect to the telephone system.

Only two electrical cords can connect to the telephone system.

No electrical cord can connect to the telephone system – must use conduit wiring installed by a certified electrician (example: when system is floor mounted).

AC Power Component Requirements

Table 5-4show the cabinet parts required to distribute AC power for various configurations of the Strata CTX cabinets.

Table 5-4 Rack Mount Cabinet Power Component Requirements for 120VAC Primary Power

Local

 

 

 

Cabinets

 

 

 

Electrical

 

 

 

 

 

 

 

Code

1

2

3

4

5

6

7

 

 

 

 

 

 

 

 

Allows only

 

 

 

 

 

 

 

one 120VAC

0 BRPSB120A

1 BRPSB120A

1 BRPSB120A

N/A

N/A

N/A

N/A

power cord

 

 

 

 

 

 

 

from system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Allows two

 

 

 

 

 

 

 

120VAC

0 BRPSB120A

0 BRPSB120A

1 BRPSB120A

1 BRPSB120A

2 BRPSB120A

N/A

N/A

power cords

 

 

 

 

 

 

 

from system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

One dedicated, isolated, 20 amp. AC circuit breaker with dual outlets is required.

N/A= If the system contains more than three cabinets and if the local code allows only one AC cord, the system requires a BCCB120 conduit box wired by a certified electrician when using 120VAC as primary power. Otherwise, 208VAC or 240VAC should be used as the primary power source (see cabinet power options listed below). If more than five cabinets are installed, 208VAC or 240VAC is required.

Table 5-5 Rack Mount Cabinet Power Component Requirements for 208VAC or 240VAC Primary Power

Local

 

 

 

Cabinets

 

 

 

Electrical

 

 

 

 

 

 

 

1

2

3

4

5

6

7

Code

Allows One

 

 

 

 

 

 

 

AC power

1 BACL240A

1 BRPSB240A

1 BRPSB240A

2 BRPSB240A

2 BRPSB240A

3 BRPSB240A

3 BRPSB240A

cord from

2 BACL240A

3 BACL240A

4 BACL240A

5 BACL240A

6 BACL240A

7 BACL240A

 

system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Important! The plugs and wall receptacles required by the local electrical code might differ for 208VAC and 240VAC. Thus in some areas of the U.S., the plug used on the Toshiba 240VAC power strip and 240VAC power supply cord (NEMA code 6-20P) can not be used for 208VAC installations. In this case, when using 208VAC, the AC plugs on the BPSB240 power strip cord that connects directly to the 208VAC wall outlet must be changed by a certified electrician per the local electrical code.

Rack Mount Cabinets

Strata CTX I&M 06/04

5-27

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Toshiba CTX28 manual Cabinet AC Power Considerations, AC Power Component Requirements