12F412 - 795 AAC 3-over-3 Double Circuit Double Deadend (Obsolete - See 12F402)
Revision 3
Aug 12, 2022
Notes:
- 50’ minimum pole height without communication attachments. 60’ minimum pole height with communication attachments.
- Engineer must specify the size & number of down guys and anchors depending on conductor design tension, line angle, available down guy lead and span length. Refer to T&D Guideline 4-6 and Compatible Unit Sections A and G.
- To avoid accidental contact with jumpers, primary down guys must be equipped with 144" fiberglass guy strain insulators (MID 939267). Refer to T&D Guideline 4-6-1.5 for more information on use and placement of guy strain insulators.
- The upper circuit on 3-over-3 double circuit structures is an express feeder. Connect all transformers, risers and 1Ø and 2Ø taps to the lower circuit
- Crossarms to be set to split the angle in the line. Guy should be set in the plane of the crossarm if possible.
- This assembly is intended for 795 kcmil AAC (Arbutus) primary conductor installed with a maximum working tension of no more than 4,000 lb/Ø. For framing conductors with a maximum working tension of 2,500 lb/Ø or less refer to Assembly Unit 12F402.
- New overhead double circuit construction is allowed in rural areas only. Refer to T&D Guideline 4-23-7.0 — Design Practices for Constructing Double Circuit Lines.
| Compatible Unit | Description | Quantity |
|---|---|---|
| I0315 | Insulator, 15kV DE Porcelain Dbl DE Assembly w/ 20” D.A. Bolt - Two-Way Pole Mount DE | 1 |
| I0323 | Insulator, 15kV Polymer Sgl DE Insulator w/ 5/8” Anchor Shackle - One-Way DE | 10 |
| I0329 | Insulator, 15kV Polymer Dbl DE Assembly w/ 20” D.A. Bolt - Two-Way Pole Mount DE | 1 |
| I0387 | Insulator, 15kV Sgl Polymer Vise-Top Insulator - 5/8" x 6-1/2" Pin Fiberglass Crossarm Mount | 5 |
| I0393 | Insulator, 15kV Dbl Stl Pole Top Pin w/ Polymer Vise-Top Insulator (For Pole Top Deadending Only) | 1 |
| R1115 | Split-Bolt, Pole Top | 1 |
| T0304 | Clamp, Straight Line Deadend 795 kcmil (336.4 - 1113 kcmil ACSR, 336.4 - 1200 kcmil AAC) | 14 |
| X0212 | Crossarm, 10' Deadend 5-Pos. Hvy. Duty Unitized Assembly | 2 |
| Z0650 | Connector, Wedge 795 to 795 kcmil AAC/ACSR | 14 |