Installing Ferrite Beads Onto Dc Power Cables - Nortel 7400 Hardware Installation
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346 Chapter 39 Hardware procedures
Installing ferrite beads onto dc power cables
Prerequisites
NN10600-175 6.1S2
Install ferrite beads onto the dc power input cables of a device to ensure that
the cables comply with the Class B containment of electromagnetic
interference (EMI) standard.
WARNING
Risk of injury or equipment damage by electricity
If the barrel of any power input cable lug shows exposed
metal near the edge of the insulation panel, that is, an
uninsulated portion, contacting that metal risks
electrocution or equipment damage. If any lug barrel is
uninsulated, you must power down the device and its
upstream power feed and fully insulate the lug barrels
before adding any ferrite beads.
WARNUNG
Verletzungsgefahr oder Geräteschäden durch
Elektrizität
Falls die Hülse eines Stromeingangskabelschuhs am
Rand der Isolierverkleidung blankes Metall, also einen
unisolierten Bereich, aufweist, besteht beim Berühren
dieses metallenen Bereichs Lebensgefahr bzw. es
können Geräteschäden auftreten. Bei einer unisolierten
Hülse müssen Sie den Schalter sowie dessen Upstream-
Stromzufuhr ausschalten und die Kabelschuhhülsen
vollständig isolieren, bevor Sie Ferrit-Dämpfungsperlen
einsetzen.
•
Ensure that the power cables are not too large for the beads. The ferrite
bead kit NTJS6381, which contains 3 ferrite beads and 6 tie-wraps,
accommodates cable pairs up to 2.5 cm (1 in.) in diameter. This includes
cables sizes from No. 10 to 6 AWG (5.26 mm
2
to 16 mm
for the full acceptable range).
2
2
to 13.30 mm
or 4.0 mm
2
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