JRC JLN-900 Installation And Instruction Manual page 64

Transducer Cable to Sig.Processor NJC-80
The Transducer cable must be installed/laid in a way to allow removal in case of
service or replacement of a defective Transducer.
Installation on cable trays or ladders should assure that the cable is accessible and
not strapped together with other permanently installed cables.
The cable must be separated at least 0.5 m from any other high power/frequency
cable as well as avoid crossing such cables.
Whenever installation conditions require use of conduit (e.g. pipe through water
filled tank, etc.) the internal diameter should be adequate to enable easy cable
traction/retraction. Transducer cable diameter is approximately 21 mm, thus a pipe
inner diameter of 50 mm (~2 inches) is recommended or never less than 38 mm
(~1.5 inch) much depending on number of bends on the conduit.
Minimize the number of pipe bends as well as assure that the bend radius is never
less than 0.5 m. Keep pipe as straight as possible.
The cable bend radius shall never be less than 200 mm.
Never cut the cable! Warranty is void if cable is cutor violated.
Excessive cable length.shall be coiled both close to NJC-80 as well as a service coil
left nearby the Sea Valve, see figure blow:
4-26