bluesea.com APPENDIX 159 1. Choose the Correct Wire Protect Your Boat With the Correct Size Wire and Fuse Scan to download the app or go to www.circuitwizard.bluesea.com © Copyright 2022 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
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