Cable In Steel Conduit - Simrad 38-200 COMBI D - INSTALLATION REV A Installation Manual

Simrad 38/200 Combi D Transducer
16

Cable in steel conduit

It is strongly recommended to lay a steel conduit from the
transducer's cable gland to the echo sounder transceiver, and to
pull the transducer cable through this conduit. There are two
reasons for this.
• First, it will make it easier at a later stage to replace the
transducer.
• Second, noise and interference from other electrical
equipment is greatly reduced.
With a steel conduit the installation will satisfy the EU
regulations for EMC interference. Without a steel conduit, there
is a risk of reduced echo sounder performance.
The steel conduit must be unbroken and watertight from the
transducer to above the water line. From there, the cable can be
pulled further, or a junction box can be installed to facilitate
further connections. Note that the steel conduit must act as a
continuous electrical screen all the way. To ensure proper
shieklding, the conduit must be electrically connected to the
echo sounder transceiver chassis.
Steel conduit dimensions:
• minimum 35 mm inner diameter
• minimum 6 mm wall thickness (4.5 mm if galvanised).
If two or more transducers are installed close to each other it is
possible to pull their cables in the same steel conduit, provided
the conduit diameter is increased accordingly. However, for easy
replacement it is recommended that each transducer has its own
steel conduit.
851-165215 / Rev.A