Safety is the state of being "safe" (from the French), the condition of being protected from harm or other undesirable results. Safety can also refer to the control of recognized hazards to achieve an acceptable level of risk. There are two slightly different meanings of security. For example, home safety may indicate the building's ability to protect itself from external damage events (such as weather, home invasion, etc.), or may indicate that its internal facilities (such as appliances, stairs, etc.) or harmful) for its inhabitants.
Security discussions often include mention of related terms. Security is such a term. Over time, the definitions between these two have often been exchanged, equalized and often appear juxtaposed in the same sentence. Unfortunately, readers must conclude if they constitute redundancy. This confuses the singularity that must be reserved for each one by itself. When considered unique, as we pretend here, each term will assume its legitimate place in influencing and being influenced by the other.
Safety is the condition of a "steady state" of an organization or place doing what it is supposed to do. "What you are supposed to do" is defined in terms of public codes and standards, architectural designs and associated engineers, corporate vision and mission statements, and operational plans and personnel policies. For any organization, place or function, large or small, security is a normative concept. It complies with the specific definitions of the situation of what is expected and is acceptable.
Using this definition, protection against external threats to a home and protection against structural and internal failures of equipment (see Meaning, above) are not two types of security, but rather two aspects of a house's steady state.