Publicité
Maintaining Safe Installation Distances
OL-10264-01
Get user manuals:
See SafeManuals.com
Except at the edge connector that plugs into the host chassis expansion slot, clearance and creepage
distances of x millimeters (mm) and y mm as listed in
other parts of the host, including any other expansion cards fitted.
Table 1
Creepage and Clearance Distances Based on Voltage
Voltage Used or Generated by Other Parts of the
Host or Expansion Card (Vrms
Up to 50
Up to 125
Up to 250
Up to 300
1. Vrms = root mean square voltage.
2. VDC = volts direct current
3. The creepage distances not in parentheses apply when the equipment is installed in a normal office
environment. The larger dimensions, in parentheses, must be applied when the equipment is installed in an
environment in which dust and other types of pollution could conduct electricity because of the effects of
dampness and condensation. This applies to locations subject to high humidity.
Clearance distances are defined as the minimum distance measured in air between two points (that
is, line of sight).
Creepage distances are defined as the minimum distance measured across the surface of an insulator
between two points (that is, following the contour of the insulator).
Creepage and clearance distances are measured between adjacent parts as shown in
Figure 1
Creepage and Clearance Distances between BRI WAN Interface Card and Components
Host
y
x
Component
Note that in
Figure
1, "x" indicates the clearance distances between cards and adjacent cards and
components, and "y" shows the creepage path across the surface of an insulator and between the two
points indicated by "x."
Regulatory Compliance and Safety Information for the Cisco AS5400 and Cisco AS5400XM Universal Gateways
Table 1
Creepage
1
2
or VDC
)
(y mm)
2.4 (3.8)
3.0 (4.8)
5.0 (8.0)
6.4 (10.0)
Card
Adjacent card
x
Maintaining Safe Installation Distances
must be maintained between the cards and
Clearance
3
(x mm)
2.0
2.6
4.0
4.0
Figure
1.
3
Publicité
