What code establishes the standards for electrical installations in Washington State?

The correct answer, which is the Washington State Electrical Code, establishes the standards for electrical installations in Washington State. This code is crucial as it integrates and modifies the National Electrical Code (NEC) to cater specifically to the needs and conditions within Washington State.

The Washington State Electrical Code is designed to ensure safety, compliance, and consistency in electrical installations and helps guide electricians in their work. While the National Electrical Code serves as a foundational standard across the United States, the Washington State Electrical Code incorporates state-specific amendments and regulations that are essential for addressing local environmental concerns, building practices, and safety requirements.

In contrast, the International Building Code primarily governs structural and general building requirements but does not specifically address electrical systems. Federal Electrical Standards provide guidelines at a national level but aren't tailored to state-specific scenarios or local regulations, making them less applicable in this context.