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Electrical Wiring

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Wire Size Comparison MEl ec- Ch 2 - 2 #16 top to #10 bottom #2 top to #10 bottom

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Copper Wire Characteristics MEl ec- Ch 2 - 3

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12 VDC Wire Size Selection MEl ec- Ch 2 - 4

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120 VAC Wire Size Selection MEl ec- Ch 2 - 5

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Types of Electrical Wire

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Multi Stranded Power Wire. High Wattage Needs Greater surface area.

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Wire Terminations Crimping Special Tool Approved Marine Connectors Use of Ratcheting Tool Solder Heat-shrink Tubing MEl ec- Ch 2 - 14

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Wire Terminals MEl ec- Ch 2 - 15

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Ratcheting Crimper MElec-Ch2 - 16 YES NO

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Ratcheting Tool Use First select appropriate connector Strip insulation length of stem plus 1/16 Insert stripped end all way into terminal End should extend 1/16 Place terminal in same color slot First crimp end of terminal barrel nearest ring Then crimp wire end of terminal barrel Check the connection with a solid tug MEl ec- Ch 2 - 17

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Soldering Terminal connection cant be only soldered Must also be crimped Soldering is normally not required Crimped connectors are acceptable to ABYC If solder, apply only to ring end of terminal Solder changes stranded wire into solid Stranded wire is flexible Use 40% lead / 60% tin, rosin core solder Battery lugs may be only soldered MEl ec- Ch 2 - 18

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Heat-Shrink Tubing MEl ec- Ch 2 - 19 Application Steps

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Wiring Diagram Symbols MEl ec- Ch 2 - 20 Switch, double pole, single throw (DPST) Switch, single pole, single throw (SPST) Switch, single pole, double throw (SPDT) Battery (long line on top is positive) Wires connected (at dots) Wires crossing (but NOT connected) Wire (insulated, metal conductor) Incandescent Light Alternate symbol for Light Circuit Breaker Fuse Ground Male Connector Female Connector