This publication provides technical guidance for electrical engineers and other professional engineers, maintenance managers and construction managers interested in maintenance of underground and submarine cables. Here is what is discussed: 1. BASIC DESIGN 2. GENERAL CONSTRUCTION GUIDANCE 3. CABLE SAFETY 4. STRUCTURE SAFETY 5. FREQUENCY OF UNDERGROUND SYSTEM INSPECTIONS 6. STRUCTURE INSPECTIONS 7. CABLE INSPECTIONS 8. UNDERGROUND EQUIPMENT INSPECTIONS 9. STRUCTURE MAINTENANCE AND REPAIR 10. DUCT LINE MAINTENANCE AND REPAIR 11. CABLE FAULTS 12. VISUAL METHODS OF CABLE FAULT LOCATING 13. DETERMINING TYPE OF CABLE FAULT 14. CABLE FAULT LOCATING TEST METHODS 15. SIMPLIFYING CABLE FAULT LOCATING 16. CABLE FAULT LOCATING EQUIPMENT 17. TRACING THE CABLE FAULT SIGNAL 18. SELECTING CABLE FAULT LOCATING METHODS 19. UNDERGROUND CABLE REPAIRS 20. SUBMARINE CABLE REPAIRS 21. CABLE REPAIR SAFETY 22. MAKING CABLE REPAIRS 23. SOLID DIELECTRIC CABLE REPAIRS 24. OTHER CABLE INSULATION AND COVERING REPAIRS 25. OTHER CABLE COMPONENT REPAIRS 26. CABLE TESTS 27. CABLE INSULATION RESISTANCE TESTS 28. CABLE OVERVOLTAGE TESTS 29. CABLE POWER FACTOR TESTS 30. CABLE MOISTURE TESTS 31. CABLE TEST RECORDS