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Looking for Generator Rental in Singapore? A temporary electrical installation may appear to be operating normally while still containing hidden safety issues.
During a recent LEW inspection, Kian Lee Seng identified that a generator neutral star point had not been bonded to the generator earth terminal. The issue was rectified before the installation was commissioned.
A thorough LEW inspection helps protect:
Choosing a generator rental provider is about more than just the equipment—it is about the competence behind the installation. At Kian Lee Seng, every temporary power installation is professionally inspected, tested and verified by our Licensed Electrical Worker (LEW) before commissioning.
During a recent Licensed Electrical Worker (LEW) inspection of a temporary electrical installation, our team identified an irregularity that was not immediately apparent during the initial inspection.
The installation appeared complete, with no obvious irregularities visible during the initial visual inspection. However, further verification inside the generator terminal compartment revealed that the generator neutral star point had not been bonded to the generator earth terminal.
This finding highlights why a proper LEW inspection involves much more than confirming that equipment powers up. Protective measures, earthing arrangements and electrical safety systems must also be verified to ensure they operate as intended under fault conditions.
LEW Explained: What Is a Generator Star Point?
The generator star point is the common connection of the three phase windings. In many temporary power installations, bonding this point to earth forms an important part of the electrical protection system.
During the inspection, the generator terminal compartment was opened for verification.
The neutral (N) conductor was correctly terminated. However, there was no bonding conductor connecting the generator neutral star point to the generator earth (G) terminal.
The irregularity was identified during the LEW inspection, rectified, and verified through subsequent testing before the installation was approved for service.
After identifying the missing neutral-earth bond, the appropriate bonding conductor was installed between the generator neutral star point and the generator earth terminal.
The installation was subsequently re-tested and verified before being commissioned for service.
The generator may appear to be complete and ready for use, but electrical safety involves much more than verifying that equipment powers up.
In many temporary electrical installations, the generator neutral star point is intentionally bonded to the generator earth terminal to establish the required earthing arrangement. This enables protective devices to respond appropriately during an earth fault.
Without the appropriate neutral-earth bond, protective devices may not operate as intended under certain fault conditions. Depending on the installation design and earthing system, this may increase the risk of:
Every installation is unique, which is why proper inspection and verification by a Licensed Electrical Worker (LEW) are essential before commissioning.
Safety Insight
A temporary electrical installation can appear to be operating normally while still containing hidden electrical safety issues that only proper inspection and testing can identify.
A proper LEW inspection goes far beyond confirming that equipment is energised. It involves a systematic process of inspection, testing and verification to ensure that the temporary electrical installation complies with the intended design and that protective measures operate correctly.
Depending on the installation, the inspection may include:
These inspections and tests work together to identify hidden defects that may not be visible during a routine visual inspection, helping to ensure the installation is safe before it is commissioned.
Electrical safety is not about whether an installation powers up.
It is about ensuring that every protective measure has been properly installed, inspected and verified before the installation is commissioned.
The issue highlighted in this inspection was successfully identified, rectified and re-tested before the temporary electrical installation was placed into service—demonstrating the value of a thorough LEW inspection and the importance of attention to detail.
Whether you’re organising an event, supporting a construction site or setting up a temporary installation, safe temporary power begins with proper planning, design, installation and verification.
Kian Lee Seng provides:
Every temporary power installation is professionally inspected, tested and verified by our Licensed Electrical Worker (LEW) before commissioning, giving our clients confidence that their electrical systems are safe, reliable and ready for operation.
This article is shared for educational purposes only. Client identities, locations and equipment details have been omitted. The observations described relate to a specific temporary electrical installation. Earthing arrangements, inspection and testing requirements should always be assessed by a qualified Licensed Electrical Worker (LEW) in accordance with the applicable regulations for supply installation, including SS 638:2018 – Code of Practice for Electrical Installations and SS 650:2019 – Code of Practice for Temporary Electrical Installations, as applicable to the installation design.
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