H3C S1850-X Series, Руководство по установке

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Item Requirements
•
Lasting low relative humidity can cause washer contraction and
ESD and cause issues including loose mounting screws and circuit
failure.
•
High temperature can accelerate the aging of insulation materials
and significantly lower the reliability and lifespan of the switch.
For the temperature and humidity requirements of the switch, see
technical specifications in
H3C S1850-X & S1850V2-X & S1850V2-EI
Switch Series Hardware Information and Specifications .
Lightning protection
CAUTION:
Ground the switch correctly and verify the grounding. For more
information, see "
Grounding the switch ."
•
If you ground the switch by using a grounding strip, make sure the
grounding resistance of the grounding strip in the equipment room is
less than 1
Ω.
•
If you ground the switch by using a grounding conductor buried in
the earth ground, make sure the grounding resistance of the
grounding conductor in the ground is less than 10
Ω
.
•
Route the signal cables along indoor walls, bury the cables in the
earth ground, or thread the cables through steel tubes. Install a
signal lightning arrester with a nominal discharge current for a
corresponding network interface.
•
Keep the signal cables far from power cords and lightning rod down
conductors.
•
As a best practice, route power cords indoors. If an AC power cord
is routed from outdoors, connect the AC power cord first to a power
lightning arrester before leading it to the AC power port on the
switch. Make sure the power lightning arrester has a nominal
discharge current and the total length of the power cord from the
power lighting arrester to the power port on the switch is less than 5
m (16.40 ft).
•
Ground the switch, rack, independent power supplies, and lightning
arresters separately.
•
You must ground optical fibers with reinforcing metal stiffener from
outdoors on an optical distribution frame (ODF) or fiber splice
enclosure.
Cable routing
CAUTION:
Do not run an Ethernet cable and power cord in parallel.
•
Route different types of cables separately.
•
Keep power cords a minimum of 5 cm (1.97 in) away from other
cables.
ESD prevention
•
Ground the switch correctly.
•
To avoid ESD damage to the device or components, always wear an
ESD wrist strap when you install or remove the device or
components.
•
Make sure the wrist strap has good skin contact and is reliably
grounded.
Cleanliness For more information, see " Cleanliness ."
Corrosive gas prevention
The installation site must be free from corrosive gases such as acid
gases and alkaline gases. For more information, see "
Corrosive gas
limit ."
EMI
•
If AC power is used, use a single-phase three-wire power receptacle
with protection earth (PE) to filter interference from the power grid.
•
Keep the device far away from radio transmitting stations, radar