Which standard must electrical wiring and installation conform to, unless otherwise noted?

The correct answer is ABYC E-11, which is the standard that specifically addresses the requirements for electrical systems on boats. This standard ensures safety and reliability for electrical installations in marine environments due to the unique conditions they typically face, such as moisture, corrosion, and movement. By adhering to ABYC E-11, individuals and organizations are following the guidelines that take into account the nuances of marine electrical systems, making it the primary standard for such applications.

The other standards listed, such as ISO 9001, UL 1103, and IEC 60364, serve different purposes or are applicable in different contexts. ISO 9001 deals with quality management systems and does not directly govern electrical installations. UL 1103 pertains to a specific type of performance standard for marine applications but is not the overarching standard for all electrical wiring installations. IEC 60364 is a broader electrical installation standard applicable to various environments but is not specifically tailored to marine applications like ABYC E-11. Thus, ABYC E-11 is the standard that must be followed for electrical wiring and installation in marine settings unless otherwise stated.