What color is generally used to indicate emergency circuits on blueprints?

The color red is universally recognized for indicating emergency circuits on blueprints. This standardization helps ensure that anyone reviewing the plans can quickly identify critical electrical systems that must be prioritized during installation, maintenance, or troubleshooting. Emergency circuits typically include essential services such as exit lights, emergency lighting, and fire alarms, which are crucial for safety in emergency situations. By using red, it signals urgency and importance, which aligns with how red is often associated with danger or immediate attention in various contexts. This clear color-coding helps prevent confusion when working with complex electrical systems, ensuring safety and compliance with regulations.