Check and accept the low voltage electrical system after construction

NGÀY ĐĂNG 18/09/2025

Admin

In any project, the low voltage electrical system (ELV) always plays an important role in ensuring security, safety and smooth operation of a project. After completing the installation, the inspection and acceptance of the low voltage electrical system is a mandatory step to confirm the construction quality, ensuring compliance with the design and technical standards. This process not only helps to detect and promptly correct errors, but also serves as a legal basis for handing over, operating and maintaining the system later. So, what items need to be checked, what are the criteria and how is the low voltage electrical acceptance process carried out? The following article will provide detailed instructions so that you have the clearest and most complete view.

Why is it necessary to inspect and accept the low voltage electrical system?

After the construction is completed, the inspection and acceptance of the low voltage electrical system is a mandatory requirement to assess the quality, detect errors and officially hand over to the investor.

• Ensure correct design & technical standards: Confirm that the system is installed according to the drawings, equipment types, and complies with TCVN and fire prevention and fighting regulations.
• Ensure safety & stable operation: Prevent incidents such as electrical short circuits, false fire alarms, loss of camera signals.
• Detect errors in a timely manner: Inspection helps identify installation errors, incorrect connections, missing labels, etc. to fix before putting into use.
• Extend system life: When the system is thoroughly inspected, the equipment operates more stably and sustainably.
• Legal conditions for handover & payment: The acceptance report is the basis for settlement, warranty and maintenance later.

Low voltage electrical system items that need to be checked and accepted

Network - telecommunications system

• LAN, Wifi, IP switchboard.
• Check transmission speed, connectivity, stability.
• Ensure network cables, rack cabinets, switches, patch panels are installed properly.

CCTV camera system

• Check location, viewing angle, image quality during the day and night.
• Ensure stable transmission signal, full storage on NVR/DVR.
• Evaluate additional features: AI, motion detection, face recognition (if any).

Automatic fire alarm system

• Test smoke detector, heat detector, emergency button.
• Check fire alarm control panel, ability to activate siren - alarm light.
• Ensure signal interlock with fire extinguishing system (sprinkler, FM200...).

Access control system & intercom

• Test magnetic lock, magnetic card, fingerprint, face recognition.
• Check management software: accurate log recording, access report.
• Test indoor - outdoor intercom station: clear sound, image.

PA system

• Check speakers in areas: volume, even sound coverage.
• Test microphone, central controller, emergency notification capability.
• Ensure the system operates in conjunction with fire alarm when there is an incident.

Parking lot management system - barrier gate

• Check barrier gate opens and closes stably, safety sensors operate.
• Test parking lot management software: record license plate, vehicle card, control entry/exit.
• Ensure license plate recognition camera operates correctly.

Building management system (BMS/Smart Building)

• Check the ability to integrate, monitor and control subsystems (electricity, HVAC, lighting, security).
• Ensure data displayed on BMS software is accurate and synchronized.
• Test the warning function, error reporting when there is a problem.

Inspection and acceptance process of low voltage electrical systems

Document inspection

• Legal documents: Check construction permits, fire prevention and fighting certificates (PCCC), and related documents.
• Design documents: Review design drawings, technical descriptions, and accompanying documents to clearly understand the project requirements.
• Completion documents: Compare the completion drawings with the actual installation to ensure that any changes (if any) are recorded.
• Certificate of origin (CO), certificate of quality (CQ): Verify the origin and quality of equipment and materials.

Site inspection

Inspect materials and equipment: Compare actual equipment with the approved list. Check labels, serial numbers, physical condition (scratches, damage).

Construction inspection

• Cable system: Check wiring, connections, insulation. Ensure cables are protected in conduits and comply with safety standards.
• Terminals: Check the installation of cameras, sensors, speakers, monitors, network sockets, etc. Ensure the installation location is correct and secure.
• Racks, equipment cabinets: Check if the racks are installed straight, neat, have a cooling system and adequate grounding.

Check system functions

• LAN, WAN network systems: Measure and test signals, transmission speed. Check Internet and internal connections.
• CCTV system: Check image quality, recording, playback, and remote access capabilities.
• PA system: Check sound quality, coverage, and emergency notification functions.
• Access Control system: Check recognition capabilities (card, fingerprint, face), door opening/closing capabilities, and integration with other systems.
• Anti-theft alarm system: Test sensors to test alarm functions.
• Internal telephone system: Test call quality, forwarding capabilities, and other features.

Trial operation and training

• Trial operation: Test the entire system for a certain period of time to detect errors. Simulate real-life situations to evaluate performance.
• Training staff: Instruct the investor's staff on how to use, operate, and handle basic problems. Hand over complete user manuals.

Record of acceptance

• After the testing steps are completed and the system is operating stably, the relevant parties (investor, contractor, and supervision consultant) will jointly prepare a record of acceptance.
• This record confirms that the system has been completed according to the design, meets technical standards, and is accepted by the investor for handover. The record of acceptance is the basis for payment and warranty.

Sample Minutes of Acceptance of Low Voltage Systems

After understanding the steps and inspection criteria, referring to a sample Minutes of Acceptance of Low Voltage Systems will help you better visualize the presentation, required content and standard form in practice. This minute usually includes project information, list of items to be accepted, inspection results, opinions of relevant parties and confirmation signatures.

You can refer to the sample Minutes of Acceptance file below to apply to your project quickly and accurately.

Refer to Minutes of Acceptance of Low Voltage Systems: here