71738 3 Berkeley B15P4MS10231 Cable Selection Guide

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71744 3 Berkeley B20P4Ms10231 Cable Selection Guide 71744_3_Berkeley B20P4MS10231 Cable Selection Guide

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Cable Selection	

4" submersible motors
In a replacement installation, the well already has 210 feet of buried
#12 cable between the service entrance and the well head. The
question is: What size cable is required in the well with a 1 HP, 230 Volt,
1 PH, 3W motor setting at 310 feet?
1. According to the table, #12 cable is large enough for the 1 HP motor
so the percent of the maximum allowable cable used by the 210-foot
run is 210 ÷ 359 = 58.5%, since 359 feet is the total allowable.
2. With 58.5% of the total allowable cable already used between the
service entrance and the well head, only 41.5% is left for the well.
Therefore, the 310 feet needed in the well can only utilize 41.5% of
the total feet allowed in the table.
3. From the table, 41.5% of the 573 feet for #10 cable equals only 238
feet, so a larger size is needed. For #8, 41.5% of 908 feet = 377 feet.
As a result, #8 can be used for the 310 feet in the well.

Two different cable sizes can be used.
The example below is for reference and uses the CSIR chart below.
Depending on the installation, any number of combinations may be
used, as long as the total percentage length of the two cables used
does not exceed 100%. This is to ensure that adequate voltage will be
supplied to the motor.

EXAMPLE:
1 HP,
230 Volt, 3W,
1 PH Motor
using CSIR
chart

CAUTION

Use of wire size smaller than listed will void warranty.

MOTOR LEAD LENGTHS – PENTEK® 2-WIRE MOTORS
60 Hz Motor Rating

60C and 75C Insulation – AWG Copper Wire Size

Volts

HP

14

12

10

8

6

4

3

2

1

1/0

2/0

3/0

4/0

115

1/2

115

183

293

463

721

1150

1445

1825

2299

2902

3662

4623

5824

11733

230

1/2

466

742

1183

1874

2915

4648

5843

7379

9295

3/4

342

545

869

1376

2141

3413

4291

5419

6826

8617

10871

1

241

383

611

968

1506

2400

3018

3811

4801

6060

7646

9652

1-1/2

199

317

505

801

1246

1986

2496

3153

3972

5013

6325

7985

MOTOR LEAD LENGTHS – PENTEK 3-WIRE MOTORS
CSIR Control Boxes
60 Hz Motor Rating

60C and 75C Insulation – AWG Copper Wire Size

Volts

HP

14

12

10

8

6

4

3

2

1

1/0

2/0

3/0

4/0

115

1/2

87

138

221

349

544

867

1090

1376

1734

2188

2761

3485

4391

1/2

348

553

883

1398

2175

3467

4359

5505

6935

8753

230

3/4

264

420

670

1061

1651

2632

3309

4178

5264

6644

8383

1

226

359

573

908

1413

2252

2831

3575

4504

5685

7173

2/0

3/0

4/0

CSCR Control Boxes
60 Hz Motor Rating
Volts

230

60C and 75C Insulation – AWG Copper Wire Size

HP

14

12

10

8

6

4

3

2

1

1/0

1/2

447

711

1135

1797

2796

4458

5604

7078

8916

11254

3/4

348

553

883

1398

2175

3467

4359

5505

6935

8753

1

304

484

772

1223

1903

3034

3814

4817

6068

7659

9663

1-1/2

197

314

501

793

1234

1968

2474

3124

3936

4968

6268

2

180

286

456

722

1123

1790

2251

2843

3581

4520

5703

3

133

211

5

11044

337

534

830

1324

1664

2102

2648

3342

4217

5323

206

326

507

809

1017

1284

1618

2042

2577

3253

All lengths in feet.
NOTE: Based on service factor amps, 30C ambient and 5% voltage drop.
(1) This table is based on copper wire. If aluminum wire is used it must be two sizes larger. Example: When the table calls for
#12 copper wire you would use #10 aluminum wire.
(2) Cables #14 to #0000 are AWG sizes.
PENTEK® is a registered trademark of Pentair Water.
	Customer Service: 1-888-782-7483 (USA)

•

1-888-363-PUMP (Canada)

1

www.berkeleypumps.com

•

Pentair Water

• Delavan, WI 53115 USA CB6342WS (10/24/11)

Cable Selection	

4" submersible motors

MOTOR LEAD LENGTHS – PENTEK® 3-PHASE MOTORS
60 Hz Motor Rating
Volts

200

230

60C AND 75C Insulation – AWG Copper Wire Size

HP

14

12

10

8

6

0.5

657

1045

1667

2641

4109

3/4

423

674

1074

1702

2648

2

1

1/0

2/0

3/0

4/0

1

346

551

879

1392

2166

3454

4342

265

421

672

1064

1655

2638

3317

2

217

344

549

870

1354

2158

2714

3427

4317

5449

3

159

253

403

638

993

1583

1990

2513

3166

3996

5

94

150

239

379

590

940

1182

1493

1881

2374

2995

3781

4764

1005

1266

1598

2017

2546

3207

7.5

64

101

161

255

397

633

796

0.5

756

1202

1917

3037

4725

7532

9469

0.75

562

894

1426

2258

3513

5601

7041

8892

1

466

742

1183

1874

2915

4648

5843

7379

1.5

359

571

912

1444

2246

3581

4502

5685

7162

9040

2

288

459

732

1159

1803

2874

3613

4563

5748

7256

9155

3

217

345

551

872

1357

2163

2719

3434

4326

5460

6889

8696

10956

318

503

783

1248

1569

1982

2496

3151

3976

5019

6323

334

519

827

1040

1314

1655

2089

2635

3327

4192

5

575

3

1.5

7.5

460

4

0.5

2922

4648

7414

0.75

2191

3486

5560

8806

1

1753

2789

4448

7045

1.5

1370

2179

3475

5504

2

1153

1835

2926

4635

7212

3

827

1315

2098

3323

5171

5

516

820

1308

2072

3224

5140

7.5

325

516

824

1305

2030

3236

4068

5138

6472

1024

1593

2540

3193

4033

5080

10

255

405

647

1.5

2283

3631

5792

2

1660

2641

4212

6671

3

1336

2126

3390

5370

5

721

1147

1829

2897

4507

7.5

548

871

1390

2202

3426

All lengths in feet.
NOTE: Based on service factor amps, 30C ambient and 5% voltage drop.
(1) This table is based on copper wire. If aluminum wire is used it must be two sizes larger. Example: When the table calls for
#12 copper wire you would use #10 aluminum wire.
(2) The portion of the total cable that is between the service entrance and a 3-phase motor starter should not exceed 25% of the
total maximum length to assure reliable starter operation.
(3) Cables #14 to #0000 are AWG sizes.

	Customer Service: 1-888-782-7483 (USA)

•

1-888-363-PUMP (Canada)

2

www.berkeleypumps.com

•

Pentair Water

• Delavan, WI 53115 USA CB6342WS (10/24/11)



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