Splicing the cable using a junction box isolated from vessel’s ground
Do not solder the wires together using only electrical tape for insulation. This will result in electrical noise and reduced operational performance.
Do not connect the cable screen to vessel ground.
Image
A The junction box is isolated from vessel ground.
B Cable gland
C Terminal block
D Cable
E Cable screen (Do not connect the cable screen to vessel ground.)
Procedure
1 Mount the junction box in a suitable location.
2 Terminate the steel conduits containing the transducer cable as close to the junction box as possible.
3 Make sure that the junction box chassis is not connected to vessel ground.
Use additional insulation if this is necessary to isolate the junction box completely.
4 Remove the insulation from the transducer cable. Connect the individual wires to the terminal block.
5 Remove the insulation from the extension cable. Connect the individual wires to the terminal block.
6 Make sure that you have connected the wires 1:1, and that the colours match.
7 Connect the cable screens to the cable glands in the junction box.