Figure 3-13 Schematic Of Ac Plug Wiring - Cisco MGX MGX 8800 Hardware Installation Manual
Cisco systems switches installation guide
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- Hardware installation manual (25 pages) ,
- User manual (4 pages)
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Chapter 3
Preparing for Installation
AC Power
AC power is supplied to the MGX 8880 Media Gateway through the AC power supply tray. AC power
sources must be dedicated AC branch circuits.
Each branch circuit must be protected by a dedicated two-pole circuit breaker. The circuit breakers at the
source must have a rated trip delay time greater than those of the MGX 8880 Media Gateway circuit
breaker with a medium trip delay.
The MGX 8880 Media Gateway uses a 20-A, 2-pole circuit breaker for each AC input. It is recommended
that the site have a 20-A, 2-pole AC circuit breaker with a long trip delay at each branch circuit.
For more information about the AC power supply tray, see the
Note
page
Tip
Check the power at your site to ensure that you are receiving "clean" power (free of spikes and noise).
Install a power conditioner if necessary.
Consult Cisco Customer Service if the plans for the system's AC power include an uninterruptible power
Caution
source (UPS). It is recommended that you use a UPS with a low output impedance and the capacity to
provide the necessary fault current to trip the protection devices. If the UPS cannot provide the fault
current, the UPS must be equipped with a fault bypass switch that can trip the protection devices through
the utility power. Do not use a UPS or any power source with a Ferro-Resonant transformer.
For mission-critical applications, it is recommended that you use the dual AC power input tray with dual
Caution
AC power cords, so that there can be no single or primary power failure.
The power receptacles to which the switch connects must be of the grounding type. The grounding
conductors that connect to the receptacles should connect to protective earth at the service equipment.
Figure 3-13
For AC power cord details (part numbers and countries), see
Figure 3-13
L1
L2
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
1-25.
shows the hookup schematic in the three-wire wall plug.
Schematic of AC Plug Wiring
200 to 240 VAC
Site Requirements for the MGX 8880 Media Gateway
"AC Power Supply Tray" section on
Table 3-29 on page
Cisco MGX 8800/8900 Series Hardware Installation Guide
3-67.
3-63
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