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154

APPENDIX

1. Choose the Correct Wire

with the correct size wire and fuse

Protect Your Boat

Scan to download

the app or go to

www.circuitwizard.bluesea.com

© Copyright 2017 Blue Sea systems Inc. All rights reserved. Unauthorized copying or reproduction is a violation of applicable laws.

Although this process uses information from ABYC E-11 to recommend wire size and circuit protection, it may not cover all of the unique characteristics

that may exist on a boat. If you have specific questions about your installation please consult an ABYC certified installer.

15 ft. (4.6 M)

10 ft. (3.0 M)

20 ft. (6.1 M)

25 ft. (7.6 M)

30 ft. (9.1 M)

40 ft. (12.2 M)

50 ft. (15.2 M)

60 ft. (18.3 M)

70 ft. (21.3 M)

80 ft. (24.4 M)

90 ft. (27.4 M)

100 ft. (30.5 M)

120 ft. (36.6 M)

130 ft. (39.6 M)

110 ft. (33.5 M)

0 to 6 ft. (0 to 1.8 M)

50 ft. (15.2 M)

30 ft. (9.1 M)

65 ft. (19.8 M)

80 ft. (24.4 M)

100 ft. (30.5 M)

130 ft. (39.6 M)

165 ft. (50.3 M)

200 ft. (61.0 M)

0 to 20 ft. (0 to 6.1 M)

5A 10A 15A 20A 25A 30A 40A 50A 60A 70A 80A 90A 100A 120A 150A 200A

C I RCU I T TYP E

16

AWG

14

AWG

12

AWG

10

AWG

8

AWG

6

AWG

2

AWG

4

AWG

6

AWG

8

AWG

10

AWG

12

AWG

14

AWG

16

AWG

2

AWG

4

AWG

6

AWG

8

AWG

10

AWG

12

AWG

14

AWG

8

2

AWG

4

AWG

6

AWG

8

AWG

10

AWG

12

AWG

1

AWG

14

AWG

2

AWG

4

AWG

6

AWG

1

AWG

0

AWG

8

8

AWG

10

AWG

12

AWG

2|0

AWG

2

AWG

6

AWG

1

AWG

0

AWG

4

AWG

8

8

AWG

10

AWG

3|0

AWG

0

AWG

2|0

AWG

8

1

AWG

2

AWG

4

AWG

6

AWG

8

AWG

3|0

AWG

6

AWG

4|0

AWG

2|0

AWG

0

AWG

8

1

AWG

2

AWG

4

AWG

4|0

AWG

3|0

AWG

2|0

AWG

0

AWG

8

1

AWG

2

AWG

4

AWG

6

AWG

8

4|0

AWG

4

AWG

3|0

AWG

2|0

AWG

0

AWG

8

1

AWG

2

AWG

6

AWG

8

4

AWG

4|0

AWG

3|0

AWG

0

AWG

8

1

AWG

2

AWG

4|0

AWG

3|0

AWG

2|0

AWG

0

AWG

8

1

AWG

2

AWG

4

AWG

4|0

AWG

3|0

AWG

2|0

AWG

0

AWG

8

1

AWG

2

AWG

4

AWG

4|0

AWG

3|0

AWG

2|0

AWG

0

AWG

8

1

AWG

2

AWG

1

AWG

4|0

AWG

3|0

AWG

2|0

AWG

0

AWG

4|0

AWG

3|0

AWG

2|0

AWG

CURRENT F LOW I N AMP S

C I RCU I T L ENGTH

Critical

Non Critical

3%

VOLTAGE DROP

10%

VOLTAGE DROP

Standard and Metric

Wire Comparison Table

Available

Wire Size

KEY

AWG

WIRE

SIZE

Available

Wire Size

AWG Metric

16

1.5

14

2.5

12

4

10

6

8

10

6

16

4

25

2

35

1

50

0

2

|

0

70

3

|

0

95

4

|

0

120

CLOSEST

EQUIVALENT

IN METRIC

--

--

--

--

--

--

--

a) Locate the CURRENT FLOW IN AMPS of your circuit

b) Select the CIRCUIT TYPE

- Non-critical circuits with 10% allowable voltage drop include: general lighting, windlasses, bait pumps, general appliances

- Critical circuits with 3% allowable voltage drop include: panel main feeders, bilge blowers, electronics, navigation lights

c) Find the CIRCUIT LENGTH

The circuit length is the length of the negative wire added to the length of the positive wire.

Calculations are based on 105°C wire. For wire rated at 90°C or lower, or for wire that passes through an engine room, the first row of the chart does not apply.

d) Intersect the CURRENT FLOW IN AMPS with CIRCUIT LENGTH to identify the correct wire size

Example: A windlass rated 80A is 25 ft. from the battery. The circuit length is the total length of the positive and negative wire added

together, which in this example is 50 ft. The circuit type is ‘non-critical’, and the correct wire size is 4 AWG.

Calculations are based on 105°C wire. For more detailed calculations, download the Circuit Wizard app or go to

circuitwizard.bluesea.com

AWG WIRE SIZE CHART

Circles indicate actual diameter of wire

(not including insulation)

4|0

AWG

3|0

AWG

2|0

AWG

0

AWG

1

AWG

2

AWG

4

AWG

6

AWG

8

AWG

10

AWG

14

AWG

12

AWG

16

AWG

WIRE SELECTION CHART