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Rack Mount Cabinets
Cabinet AC Power Considerations
Strata CTX I&M 06/04 5-27
Rack Mount Cabinets
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 5-4 show the cabinet parts required to distribute AC power for various configurations of the
Strata CTX cabinets.
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.
Table 5-4 Rack Mount Cabinet Power Component Requirements for 120VAC Primary Power
Local
Electrical
Code
Cabinets
1 2 3 4 5 6 7
Allows only
one 120VAC
power cord
from system
0 BRPSB120A 1 BRPSB120A 1 BRPSB120A N/A N/A N/A N/A
Allows two
120VAC
power cords
from system
0 BRPSB120A 0 BRPSB120A 1 BRPSB120A 1 BRPSB120A 2 BRPSB120A N/A N/A
● 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
Electrical
Code
Cabinets
1 2 3 4 5 6 7
Allows One
AC power
cord from
system
1 BACL240A
1 BRPSB240A
2 BACL240A
1 BRPSB240A
3 BACL240A
2 BRPSB240A
4 BACL240A
2 BRPSB240A
5 BACL240A
3 BRPSB240A
6 BACL240A
3 BRPSB240A
7 BACL240A