Standards Documents
The following documents, available in Adobe PDF format, detail the preferred construction methods and materials for construction projects interacting with NSTAR's electric infrastructure.Design Standards
Construction Standards
- Distribution Ductbank (C1100)
- Cold Shrink Termination for Jacketed Concentric or Flat Strap Neutral Cable (25 kV and Below) (C2010)
- Primary URD Riser (C2021)
- Power Cable Risers (For 25 kV and Below) (C2022)
- Installation of S&C Fused, Pad Mounted, Visible Break, Air Switch Rated 15 & 25 kV, 600 Amp, Manual or Motor-Operated Source Transfer Switch (Including RADSEC) with Fault Indicators or Current Transformers (C3800)
- Installation of Precast Pad Foundations for 4 kV, 15 kV & 25 kV Padmounted, Three-Phase Distribution Transformers (C3801)
- Recommended Minimum Clearances from Three-Phase Distribution Transformer Foundation to Buildings, Building Openings, Landscaping or Traveled Way (C3802)
- Installation of Precast Concrete Manholes (C3813)
- Installation of Handholes & Box Pads (C3814)
- Grounding & Bonding Pole-Mounted Equipment (C5000)
Material Standards
- Precast Concrete Manhole - 4x6x6 Inside Dimensions (M1202)
- Precast Concrete Manhole - 4x10x8 Inside Dimensions (M1204)
- Precast Concrete Primary/Secondary Pull Box Foundation - 4x4x4 Inside Dimensions (M1208)
- Precast Concrete Primary Pull Box Foundation - 5x5x5 Inside Dimensions (M1216)
- NSTAR No. 1 Solid Cover (M1300)
- NSTAR No. 1 Manhole Frame (M1303)
- 600 Volt EP Rubber Insulated Cable, 1/C (M1600)
- No. 2 AWG to 1,000 KCMIL Concentric Neutral Jacketed Cables (M1601)
- Precast Concrete Transformer Foundations - Up to 2,500 kVA (M3801)
- Precast Retaining Wall (M3803)
- Single Phase Padmounted Distribution Transformers (M3902)
- Three Phase Deadfront Padmounted Distribution Transformers - Loops & Radial Feed Designs (M3904)
Work Standards
- Cable Pulling Operations (W1604)
- Temporary Identification and Protection of Exposed Conductors on Newly Installed URD Cables (W1606)
Manufacturers Lists
- Distribution Conduit, Fittings, and Accessory Material Manufacturers and Part Numbers (C1100 Appendix)
- NSTAR Precast Concrete Manholes, Covers and Accessory Material Supplier Part Numbers (C3813 Appendix)
- 200 Amp Underground Electric Distribution Material Manufacturers and Part Numbers (D3820 Appendix)
