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CHAPTER 3
Installation Guidelines and Requirements
Mechanical Requirements
Space Requirements
Proper Rack Installation
Follow these mechanical requirements for your rack:
•
Select from the following rack options:
>
Two-post rack – a freestanding enclosed cabinet with two
mounting posts in the front
>
Telco-type rack – two adjacent mounting posts that you must
secure to the floor or an overhead structure
>
Four-post rack – a freestanding open rack, either open or closed
•
The rack must have at least two mounting posts.
•
The distance between the mounting holes in the two posts must be
18.31 inches ±.063 inch, as specified in the EIA-310-D.
•
Do not use an enclosed rack for ERX-7xx models or the ERX-310
router. It does not provide adequate ventilation.
•
A fully loaded rack with three ERX-14xx models must structurally
support 300 pounds (136 kilograms).
•
Optional mounting kits are available for 19-inch and 23-inch rack
mounting (mid- and front-chassis mounting). Contact your Juniper
Networks sales representative for more information.
If you use an enclosed rack for an ERX-14xx model, ensure that there is a
minimum of 3 inches of clearance between the inner side wall and the
router. This clearance space will allow adequate air flow.
To confirm proper equipment rack installation, check the following:
•
Racks are installed and electrically grounded according to
manufacturer instructions.
•
Equipment racks are anchored to the floor and, when possible,
anchored to the ceiling as well.
•
Equipment rack installations comply with applicable local, state, and
national codes.
Warning: To maintain airflow requirements, a plenum must be installed above
ERX-14xx models before any other piece of equipment is installed above the
router.