Lecture 5 SAES P 104 Underground Cable Systems & Duct bank

📘 E&I SERIES – Lecture 5
SAES-P-104: Wiring Methods & Materials (Underground Cable Systems & Duct Banks)
Presented by Engr. Talat Hussain | 2i Constructions

In this lecture, we cover underground cable systems and duct bank construction as per SAES-P-104 and Saudi Aramco project requirements. The session explains trench preparation, burial requirements, duct banks, cable segregation, rocky area requirements, mandrel testing, and overall best engineering practices.
This lecture is ideal for Electrical & Instrumentation Engineers, QA/QC Inspectors, and site execution teams working on underground utilities.
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⏱ Video Timeline
0:00 — Introduction
Above-ground vs underground cables and system overview.
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01:00 — Burial Requirements
• Trench Preparation
• Bedding Layer Placement
• Cable Laying Procedure
• 300 mm Sand Cover
• Warning Tape / Tiles / Mesh Installation
• Backfilling Requirements
• Standard Burial Depth Requirements
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04:40 — Rocky Area Requirements
• Additional protection layers
• Mechanical protection for cables
• Proper trench treatment in rocky terrains
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06:40 — Cable Segregation & Cable Installation
• Separation of power, control, and instrumentation cables
• Cable arrangement and spacing in trenches
• Avoiding interference and ensuring system reliability
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09:35 — Duct Banks & Requirements
• Minimum Concrete Cover: 75 mm
• Spacer Maximum Spacing: 2.4 m
• READY-MIX Application Requirements
• PVC & RGS Fitting Joints
• Bends for Protection
• PVC-Coated RGS Conduit Requirements
• Duct Bank Construction in Traffic & Non-Traffic Areas
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14:35 — Mandrel Test
• Purpose of mandrel testing
• Test process as per SAES-P-104
• Ensuring duct cleanliness and pullability
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📚 Next Module: Cable Testing
Stay tuned for the next lecture, where we will discuss Cable Testing Procedures as per SAES and international standards.
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