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922-20207011/1.0
Grounding of system cables
All metallic cable coverings (armour, metallic sheathing and other protection) must be
electrically connected to the vessel's hull at both ends except in the case of final sub-circuits
where they should be connected at the supply end only.
Grounding connections should be made using a conductor which has a cross-sectional area
appropriate for the current rating of the cable, or with a metal clamp which grips the metallic
covering of the cable and is bonded to the hull of the vessel. These cable coverings may also
be grounded by means of glands specially intended for this purpose and designed to ensure a
good ground connection. The glands used must be firmly attached to, and in good electrical
contact with, a metal structure grounded in accordance with these recommendations.
Electrical continuity must be ensured along the entire length of all cable coverings,
particularly at joints and splices. In no case should the shielding of cables be used as the
only means of grounding cables or units.
Metallic casings, pipes and conduits must be grounded, and when fitted with joints these
must be mechanically and electrically grounded locally.
Cable connections and terminations
All cable connections are shown on the applicable cable plan and/or interconnection
diagrams.
Where the cable plan shows cable connections outside an equipment box outline, the
connections are to be made to a plug or socket which matches the plug or socket on that
particular item of equipment.
Where two cables are connected in series via a junction box or terminal block, the screens of
both cables must be connected together, but not grounded.
Care must be taken to ensure that the correct terminations are used for all cable conductors,
especially those that are to be connected to terminal blocks. In this case, crimped
sleeve-terminations must be fitted to prevent the conductor core from fraying and making
a bad connection with the terminal block. It is also of the utmost importance that where
crimped terminations are used, the correct size of crimp and crimping tool are used. In
addition, each cable conductor must have a minimum of 15 cm slack (service loop) left
before its termination is fitted.
Flexview Installation Manual
Содержание Flexview
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