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Covered Conductors – Tree Wire Systems
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Covered Conductors – Tree Wire Systems

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Description

Covered Conductors – Tree Wire Systems


Description:

Tree wire or covered open wire consists of the conductor (aluminum, aluminum alloy or ACSR ) and the extruded covering (conductor shield, 

low density inner layer and protective outer layer). Covering thickness depends on   the system voltage. It is designed for full span applications 

and is supported on polyethylene insulators. We also offer a two layer covered conductor design for 15kV systems that are not subject to heavy 

tree contact. Covered conductors are available in black or gray depending on visual preference.


Benefits:

•Covering prevents faults due to contact

•Proprietary, high density outer layer resists abrasion, electrical tracking and UV degradation.

•Reduced NESC phase spacing is possible due to high impulse strength covering.

•Pole hardware is the same as bare wire construction except that polyethylene insulators are required.


Application:

Tree wire designed for systems from 15kV through 46kV. Polyethylene insulators must be used  to insure dielectric compatibility with conductor 

covering. Conductors are supported on crossarms or standoff brackets. Span lengths are limited by the conductor breaking strength and the amount 

of sag that is permissible. Covered conductors are rated for continuous operation at 75°C.

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ACSR Concentric Round Conductors

Size

 

Strands (Al/Steel)

15kV 2 layer Tree Wire

15kV Tree Wire

25kV Tree Wire

35kV Tree Wire

Cable Diameter (inches)

Cable Weight (lbs/1000 ft)

Cable Diameter (inches)

Cable Weight (lbs/1000 ft)

Cable Diameter (inches)

Cable Weight (lbs/1000 ft)

Cable Diameter (inches)

Cable Weight (lbs/1000 ft)

#2 AWG

6/1

0.616

190

0.646

207

0.846

304

NA

NA

1/0 AWG

6/1

0.698

264

0.728

284

0.928

391

1.028

454

2/0 AWG

6/1

0.747

314

0.777

336

0.977

450

1.077

516

3/0 AWG

6/1

0.802

376

0.832

400

1.032

521

1.132

591

4/0 AWG

6/1

0.863

452

0.893

478

1.093

607

1.193

681

266.8 kcmil

18/1

0.909

454

0.939

480

1.139

615

1.239

691

266.8 kcmil

26/7

0.942

534

0.972

561

1.172

700

1.272

778

336.4 kcmil

18/1

0.984

547

1.014

576

1.214

720

1.314

802

336.4 kcmil

26/7

1.020

648

1.050

677

1.250

826

1.350

910

336.4 kcmil

30/7

1.041

717

1.071

747

1.271

899

1.371

984

397.5 kcmil

18/1

1.043

629

1.073

660

1.273

812

1.373

897

397.5 kcmil

24/7

1.072

710

1.102

740

1.302

896

1.402

983

397.5 kcmil

26/7

1.083

747

1.113

778

1.313

935

1.413

1,023

477.0 kcmil

18/1

1.114

733

1.154

775

1.354

938

1.454

1,028

477.0 kcmil

24/7

1.146

830

1.186

872

1.386

1,039

1.486

1,131

477.0 kcmil

26/7

1.158

875

1.198

918

1.398

1,086

1.498

1,179

477.0 kcmil

30/7

1.183

971

1.223

1,015

1.423

1,186

1.523

1,281

556.5 kcmil

18/1

1.179

835

1.219

881

1.419

1,052

1.519

1,146

556.5 kcmil

24/7

1.214

948

1.254

994

1.454

1,169

1.554

1,265

556.5 kcmil

26/7

1.227

1001

1.267

1,047

1.467

1,223

1.567

1,321

636.0 kcmil

18/1

1.240

937

1.280

986

1.480

1,165

1.580

1,263

636.0 kcmil

24/7

1.277

1066

1.317

1,114

1.517

1,297

1.617

1,398

636.0 kcmil

26/7

1.290

1125

1.330

1,174

1.530

1,359

1.630

1,460

795.0 kcmil

24/7

1.392

1298

1.432

1,352

1.632

1,550

1.732

1,657

795.0 kcmil

26/7

1.408

1373

1.448

1,428

1.648

1,628

1.748

1,736

795.0 kcmil

45/7

1.363

1158

1.403

1,209

1.603

1,403

1.703

1,509

Aluminum Alloy (6201-T81) Concentric Round Conductors

Equivalent Size

 

Code Word

15kV 2 layer Tree Wire

15kV Tree Wire

25kV Tree Wire

35kV Tree Wire

Cable Diameter (inches)

Cable Weight (lbs/1000 ft)

Cable Diameter (inches)

Cable Weight (lbs/1000 ft)

Cable Diameter (inches)

Cable Weight (lbs/1000 ft)

Cable Diameter (inches)

Cable Weight (lbs/1000 ft)

#2 AWG

Ames

0.616

171

0.646

189

0.846

286

NA

NA

1/0 AWG

Azusa

0.698

234

0.728

255

0.928

362

1.028

424

2/0 AWG

Anaheim

0.747

276

0.777

299

0.977

413

1.077

478

3/0 AWG

Amherst

0.802

328

0.832

353

1.032

474

1.132

543

4/0 AWG

Alliance

0.863

392

0.893

419

1.093

548

1.193

621

266.8 kcmil

Butte

0.942

464

0.972

493

1.172

632

1.272

709

336.4 kcmil

Canton

1.021

559

1.051

592

1.251

741

1.351

822

397.5 kcmil

Cairo

1.083

641

1.113

677

1.313

834

1.413

918

477.0 kcmil

Darien

1.158

748

1.198

796

1.398

964

1.498

1,053

556.5 kcmil

Elgin

1.227

853

1.267

904

1.467

1,081

1.567

1,175

636.0 kcmil

Flint

1.291

941

1.331

994

1.531

1,179

1.631

1,276

795.0 kcmil

Greeley

1.408

1144

1.448

1,204

1.648

1,404

1.748

1,507


Standard

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