M7I Ac Power Electrical Safety Guidelines And Warnings; M7I Dc Power Electrical Safety Guidelines - Juniper M7I Hardware Manual

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Appendix A: Safety and Regulatory Compliance Information for the M7i Router

M7i AC Power Electrical Safety Guidelines and Warnings

The following electrical safety guidelines apply to AC-powered routers:
AC-powered routers are shipped with a three-wire electrical cord with a grounding-type
plug that fits only a grounding-type power outlet. Do not circumvent this safety feature.
Equipment grounding should comply with local and national electrical codes.
You must provide an external circuit breaker rated minimum 15 A (250 VAC) in the
building installation.
The power cord serves as the main disconnecting device. The socket outlet must be
near the router and be easily accessible.
The cores in the mains lead are colored in accordance with the following code:
Green and yellow—Earth
Blue—Neutral
Brown—Live
When a router is equipped with two AC power supplies, both power cords (one for
each power supply) must be unplugged to completely disconnect power to the router.
Note the following warnings printed on the AC power supply faceplate:
To completely de-energize the system disconnect maximum of 2 power cordsets.
Apparaten skall anslutas till jordat uttag när den ansluts till ett nätverk. [Swedish]
In Case of an Electrical Accident on page 148
General Electrical Safety Guidelines and Electrical Codes for M Series, MX Series, and
T Series Routers on page 148
M7i DC Power Electrical Safety Guidelines on page 149

M7i DC Power Electrical Safety Guidelines

The following electrical safety guidelines apply to a DC-powered router:
A DC-powered router is equipped with a DC terminal block that is rated for the power
requirements of a maximally configured router. To supply sufficient power, terminate
the DC input wiring on a facility DC source capable of supplying at least 31 A @ –48 VDC
per input for each power supply.
Incorporate an easily accessible disconnect device into the facility wiring. We
recommend that the 48 VDC facility DC source should be equipped with a circuit
breaker rated at 40 A (–48 VDC) minimum, or as required by local code. In the United
States and Canada, the 48 VDC facility should be equipped with a circuit breaker rated
a minimum of 125% of the power provisioned for the input in accordance with the
National Electrical Code in the US and the Canadian Electrical Code in Canada.
Run two wires from the circuit breaker box to a source of 48 VDC. Use appropriate
gauge wire to handle up to 50 A.
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