|
|
All cables and wiring external to equipment are to
be so installed as not to impair their original flame-retarding
properties.
To this end, the following methods may be used:
a) the use of cables which have been tested in accordance
with IEC Publication 332-3 Category A or an equivalent
test procedure for cables installed in bunches, or
b) the use of fire stops having at least B0 penetrations fitted
as follows (see Fig 1, Fig 2, Fig 3 and Fig 4):
- cable entries at the main and emergency switchboard
- where cables enter engine control rooms
- cable entries at centralised control panels for propulsion machinery and essential auxiliaries
- at each end of totally enclosed cable trunks
- at every second deck or approximately 6 metres for
verticals runs and every 14 metres for horizontal
runs in enclosed and semi-enclosed spaces
- at the boundaries of the spaces in cargo areas.
c) the use of fire protection coating applied to at least 1
metre in every 14 metres on horizontal cable runs and
over the entire length of vertical cable runs for cables
installed in enclosed and semi-enclosed spaces.
The cable penetrations are to be installed in steel plates of
at least 3 mm thickness extending all around to twice the
largest dimension of the cable run for vertical runs and once
for horizontal runs, but need not extend through ceilings,
decks, bulkheads or solid sides of trunks. These precautions
apply in particular to bunches of 5 or more cables in areas
with a high fire risk (such as Category A machinery spaces,
galleys etc.) and to bunches of more than 10 cables in other
areas.
规范里面要求的这些要求什么情况需要呢？是单芯电缆才需要么？目前接触的船里面没有做过这些东西啊。知道的大神帮忙解答一下疑惑呗
|
|
发表于 2019-10-18 10:41
提升卡
变色卡
楼主