Material and Installation Criteria for Underground Electrical Systems

Our complete manual of criteria is available for download (a 6.8 M PDF* file).

Table of Contents

1. General Notes for Underground Electrical Installations
2. Rules and Regulations
   1. Applicable Rules and Regulations, Orders, Standards, Specifications & Requirements
3. Construction Inspection
   1. General
   2. Certificate of Acceptance
4. Installation of Materials and Equipment
   1. Conduit
   2. Boxes or Enclosures
   3. Trenching and Backfill
   4. Vaults
   5. Transformer and/or Switch Pads
   6. Equipment Barrier Protection
   7. Riser on Wood Pole
   8. Conductors
   9. Bus Duct
   10. Electroliers
   11. Service Equipment
   12. Metering
   13. Landscaping and Irrigation
   14. Easement
   15. Pad-mounted Equipment Screen
   16. Warranty
   17. Access to Alameda P&T's In-Service Facilities
5. Reference Drawings

   A.	Concrete Pad for Single-Phase LT Transformers
   B.	Concrete Pad for Single-Phase LX Transformers
   C.	Concrete Pad for Three-Phase Transformers (75 to 750 kVA Sizes)
   D.	Concrete Pad for Three-Phase Transformers (1,000 kVA & 1,500 kVA)
   E.	Concrete Pad for Three-Phase Transformers (2,500 kVA)
   F.	600-Amp Switch Pad Detail
   G.	Motorized Switch Pad Details (2-Way Switch with One VFI Tap)
   H.	Concrete Pad for Padmounted Capacitor Bank
   I1.	Typical Electrolier Base for Streetlight Poles
   I2.	Typical Fiberglass Streetlight Pole Installation, Direct Buried in Poor Soil, High Water or Muddy Condition
   J.	Typical Trench Section Details
   K.	Riser Detail
   L.	Detail of Reinforcing Required in Sidewalk around Utility Boxes & Vaults
   M.	Cobra Head Streetlight Standard, Direct Buried Fiberglass Pole, 30-Foot High with 6-Foot Arm
   N.	Quad Decca Head Streetlight Standard, Direct Buried Fiberglass Pole, 30-Feet High with 14-Inch Arm
   O1.	Single Pendant Decorative Streetlight, Direct Buried, 16-Flute Fiberglass
   O2.	Double Pendant Decorative Streetlight, Direct Buried, 16-Flute Fiberglass
   P.	Post-Top Decorative Streetlight, Direct Buried, 16-Flute Fiberglass
   Q.	4'-6" x 8'-6" x 6'-0" I.D. Primary Vault Details for Driveable Area Applications
   R.	Concrete Primary/Secondary Box Details for Full Traffic Rated (H20) Box and Cover
   S1.	Polymer-Concrete Primary/Secondary Pull Box Details (Side-Entry)
   S2.	Polymer-Concrete Secondary Box Details for Sidewalk & Planter Applications (Bottom-Entry)
   T.	Bus Duct Requirements for 2,500 kVA Pad-mounted Transformer (2 Sheets)
   U.	Equipment Barrier Protection & Clearances
   V1.	Typical Residential Underground Service 100 Amperes, 120/240 Volts, 1-Phase
   V2.	Typical 100-Ampere Single-Phase Metering Pedestal
   W.	Meter Working Space
   X.	Minimum Requirements for Underground Service Cable Connection from Electric Box
   Y.	Landscape Screen for Pad-Mounted Transformers
   Z.	Wall Screen for Pad-Mounted Transformers

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