Clearance Requirements For Airflow And Hardware Maintenance For Ex4300 Switches - Juniper EX4300 Series Hardware Manual

Table 57: Cabinet Requirements and Specifications
Cabinet Requirement
Cabinet airflow requirements
Clearance Requirements for Airflow and Hardware Maintenance for
EX4300 Switches
When planning the site for installing an EX4300 switch, you must ensure sufficient clearance around the
switch.
Follow these clearance requirements:
(Continued)
Guidelines
When you mount the device in a cabinet, ensure that ventilation through
the cabinet is sufficient to prevent overheating, as follows:
•
Ensure adequate cool air supply to dissipate the thermal output of the
device or devices.
•
Ensure that the hot air exhaust of the chassis exits the cabinet without
recirculating into the device. An open cabinet (without a top or doors)
that employs hot air exhaust extraction from the top ensures the best
airflow through the chassis. If the cabinet contains a top or doors,
perforations in these elements assist with removing the hot air exhaust.
•
Install the device in the cabinet in a way that maximizes the open space
on the side of the chassis that has the hot air exhaust.
•
Route and secure all cables to minimize the blockage of airflow to and
from the chassis.
•
Ensure that the spacing of rails and adjacent cabinets is such that proper
clearance exists around the device and cabinet.
•
A cabinet larger than the minimum required provides better airflow and
reduces the chance of overheating.
135