What must signal systems be protected against?

Signal systems are crucial for ensuring safety in construction and other industrial environments, necessitating comprehensive protection from various potential hazards. Protecting against unauthorized use is essential to maintain control over signal systems; if individuals not trained or authorized to operate these systems use them, it can lead to miscommunication or accidents.

Breakage is another significant concern, as physical damage to signal systems can compromise their effectiveness. Ensuring that these systems are durable and intact helps avoid failures during critical operations, which could result in dangerous scenarios.

Weather also poses a considerable threat, particularly to outdoor signal systems. Elements such as rain, snow, wind, and extreme temperatures can affect the functionality and visibility of signals, making it necessary to have weather-resistant designs or protective measures in place.

Considering these three aspects, the necessity for protection against unauthorized use, breakage, and weather conditions illustrates why a comprehensive approach is vital. The correct answer encompasses all potential threats, reinforcing the importance of safeguarding signal systems in various environments to ensure ongoing safety and operational effectiveness.