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European-built boats imported to the United States require a complete AC system rewire to handle the lower voltage and higher amperage of the US 30-amp shore power standard. A 2001 Dela sailboat owner attempting to install an air conditioner discovered existing 2.5 square millimeter wiring, roughly equivalent to 14 AWG, which is insufficient for the 10 AWG wire required by US 30-amp shore power cables.0:17 Nigel Calder explains that European systems operate at 230 volts with lower current, while US systems operate at 120 volts, necessitating conductors roughly twice the size to prevent overheating and insulation failure.1:09 While the DC system remains compatible, the entire AC circuit must be upgraded to meet US electrical standards.1:40 Attempting to use undersized European wiring for high-load devices like air conditioners creates a significant fire hazard.Watch Replacing the existing AC wiring is the only safe method for adapting a European vessel to US shore power infrastructure.2:04

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