. Deep ocean power systems. Electric power distribution; Hydroelectric power plants. 1. Conauctor 2. Extruded strand shielding 3. Polyetliylene insulation 4. Tape 5. Copper shielding 6. Fill waterproof jute 7. Binder mylar tape 8. Polyethylene jacket 9. High-strength galvanized steel armor 10. High-density polyethylene jacket over each armor wire Figure 18. Typical cross section of selected marine cable. One of the first devices used for sealing a cable penetration on a deep submergence pressure hull was a , four-conductor cable sealed with a stuffing box design. The packing w
. Deep ocean power systems. Electric power distribution; Hydroelectric power plants. 1. Conauctor 2. Extruded strand shielding 3. Polyetliylene insulation 4. Tape 5. Copper shielding 6. Fill waterproof jute 7. Binder mylar tape 8. Polyethylene jacket 9. High-strength galvanized steel armor 10. High-density polyethylene jacket over each armor wire Figure 18. Typical cross section of selected marine cable. One of the first devices used for sealing a cable penetration on a deep submergence pressure hull was a , four-conductor cable sealed with a stuffing box design. The packing was composed of four or five layers of flax packing pressurized from both ends of the stuffing box with gland nuts. The seal was successful down to about 3,000 feet. Primary and secondary cable seals are mandatory requirements for all submersibles. The primary seal is located outboard of the pressure hull and the secondary seal is located inboard of the hull. With respect to primary cable seals, the use of watertight connectors is recommended. The connectors would provide a positive water dam in case the cable is damaged or severed. Connectors also satisfy the secondary cable seal requirement by providing a positive water dam inboard of the pressure hull. The use of connectors for hull penetrations allows the testing of such fittings under pressure prior to deployment and provides junction points for the cable conductors. This eliminates the need for junction boxes and provides a test point for checking circuits served by the connectors. Figure 19 shows a multiple-conductor hull fitting which has been used on Navy submarines. This fitting will withstand nominal shock loadings. As noted, the outboard watertight connectors are located radially around the body of the fitting to accommodate a maximum number of cables. 58. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these ill
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