12F402 - 3-over-3 Double Circuit Double Deadend (Includes Underbuild)

Revision 4
Jul 8, 2022

 

Notes:

  1. 50’ minimum pole height without communication attachments. 60’ minimum pole height with communication attachments.
  2. 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.
  3. 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.
  4. 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
  5. Crossarms to be set to split the angle in the line. Guy should be set in the plane of the crossarm if possible.
  6. 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.

Material List
Compatible Unit Description Quantity
I0387 Insulator, 15kV Sgl Polymer Vise-Top Insulator - 5/8" x 6-1/2" Pin Fiberglass Crossarm Mount 6
I0315 Insulator, 15kV DE Porcelain Dbl DE Assembly w/ 20” D.A. Bolt - Two-Way Pole Mount DE 1
I0321 Insulator, 15kV Polymer Sgl DE Insulator (Fittings: Clevis-Eye) 12
I0329 Insulator, 15kV Polymer Dbl DE Assembly w/ 20” D.A. Bolt - Two-Way Pole Mount DE 1
R1115 Split-Bolt, Pole Top 1
T030* Clamp, Straight Line Deadend
T0303 - 336.4 kcmil (3/0 - 477 kcmil ACSR, 4/0 - 556 kcmil AAC)
T0304 - 795 kcmil (336.4 - 1113 kcmil ACSR, 336.4 - 1200 kcmil AAC)		 14
X0212 Crossarm, 10' Deadend 4-Pos. Hvy. Duty 2
Z06** Connector, Wedge
Z0640 - 336.4 - 336.4 kcmil AAC/ACSR
Z0650 - 795 to 795 kcmil AAC/ACSR		 14