Grounding The System And The Main Distribution Frame - Siemens HiPath 5000 Service Manual

4.4.3.6

Grounding the System and the Main Distribution Frame

Not for U.S.: Grounding of the System
Because of their safety class, the HiPath 3550 and HiPath 3350 do not have to be
>
grounded.
If grounding is required in certain countries (for example in Finland, Norway, U.S.),
the wall housing HiPath 3550 and HiPath 3350 must be grounded by a separate
ground conductor via the ground connection marked "
For U.S. and Canada only: Grounding the system
The connector cables of systems HiPath 3550 and HiPath 3350 have a grounding. The system
must also be grounded by a separate ground conductor. This grounding connection must meet
the requirements of the relevant authorities (U.S. National Electrical Code, Canadian Electrical
Code). Lay a separate grounding from the earth to the system's grounding connector. The
cross-section of the grounding must measure at least 14 AWG.
Grounding for the external main distributor frame
Not for U.S.:
●
– HiPath 3550: Shipments always include an MDFU (Germany only) and two grounding
cables. Use one of the cables to ground the MDFU. It is not necessary to ground the
connection between the MDFU and HiPath 3550 (see Figure 4-98).
– HiPath 3350: This system type does not require an external main distribution frame.
The connection cables to the peripherals are attached directly to the boards and rout-
ed to the outside via a cable duct inside the housing.
Danger
7
An external main distribution frame which requires grounding (if the existing
ground connection is marked "
conductor (minimum cross-section = 2.5 mm
Failure to follow these instructions can result in electrical shock.
Refer to Figure 4-98 when replacing a customer system but maintaining the existing exter-
nal main distribution frame.
For U.S. only:
●
The customer supplies a main distribution frame to complete the communications system.
Mount and ground the MDF in accordance with the manufacturer's instructions.
P31003-H3560-S403-54-7620, 09/05
HiPath 3000 V6.0, HiPath 5000 V6.0, Provisional Service Manual
Installing HiPath 3550, HiPath 3350, HiPath 3500, and HiPath 3300
".
") must be grounded by a separate ground
2
)
inst_h3.fm
Installing HiPath 3000
4-175