What should be provided with the record drawings?

What should be provided with the record drawings?

• A. Sequence of operations in input/output matrix or narrative form
• B. Power supply ratings
• C. Material specifications
• D. Testing procedures

Answer: (A)

Record drawings need to convey how the system actually behaves, not just what components are installed. The sequence of operations shows, in a matrix or narrative form, the exact logic of inputs and outputs—what triggers what, in what order, and any delays or interlocks. For a fire alarm, this means documenting how a sensor or initiator leads to panel actions, annunciation, door releases, elevator recall, HVAC shutdown, and other sequence-dependent responses. Having this sequence with the drawings lets technicians understand, troubleshoot, and modify the system to match the intended function, even years later. Power supply ratings, material specifications, and testing procedures are important, but they belong in separate design, equipment, and commissioning documents rather than the record drawings themselves.

Record drawings need to convey how the system actually behaves, not just what components are installed. The sequence of operations shows, in a matrix or narrative form, the exact logic of inputs and outputs—what triggers what, in what order, and any delays or interlocks. For a fire alarm, this means documenting how a sensor or initiator leads to panel actions, annunciation, door releases, elevator recall, HVAC shutdown, and other sequence-dependent responses. Having this sequence with the drawings lets technicians understand, troubleshoot, and modify the system to match the intended function, even years later. Power supply ratings, material specifications, and testing procedures are important, but they belong in separate design, equipment, and commissioning documents rather than the record drawings themselves.