1
These values are at full load and nominal voltage.
2
For this configuration, total power is 1090 W.
3
Zone 0 requirement.
4. Calculate thermal output (BTUs). To calculate this, multiply the input power
requirement (in watts) by 3.41.
Table 85: Calculating Thermal Output
Thermal Output (BTUs per hour)Power Supply
1282 * 3.41 = 4372 BTU/hrMX480 AC Normal-capacity (high-line)
1225 * 3.41 = 4177 BTU/hrMX480 AC High-capacity (high-line)
1112 * 3.41 = 3792 BTU/hr
1
MX480 DC Normal-capacity
1112 * 3.41 = 3792 BTU/hr
1
MX480 DC High-capacity
1
Zone 0 output.
Related
Documentation
Power Requirements for an MX480 Router on page 140•
• AC Electrical Specifications for the MX480 Router on page 139
• DC Power Supply Electrical Specifications for the MX480 Router on page 157
AC Power Circuit Breaker Requirements for the MX480 Router
Each AC power supply has a single AC appliance inlet located on the power supply that
requires a dedicated AC power feed. We recommend that you use a customer site circuit
breaker rated for 15 A (250 VAC) minimum for each AC power supply, or as required by
local code. Doing so enables you to operate the router in any configuration without
upgrading the power infrastructure.
Related
Documentation
AC Electrical Specifications for the MX480 Router on page 139•
• Calculating Power Requirements for MX480 Routers on page 149
• AC Power Cord Specifications for the MX480 Router on page 153
AC Power Cord Specifications for the MX480 Router
Each AC power supply has a single AC appliance inlet located on the power supply that
requires a dedicated AC power feed. Most sites distribute power through a main conduit
that leads to frame-mounted power distribution panels, one of which can be located at
the top of the rack that houses the router. An AC power cord connects each power supply
to the power distribution panel.
153Copyright © 2017, Juniper Networks, Inc.
Chapter 12: AC Power Requirements, Specifications, and Guidelines
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