The Complete Guide to Licensed Electrical Worker (LEW) Requirements in Singapore: Certification, Responsibilities & Compliance

Introduction

Electricity powers almost every aspect of modern life in Singapore — from high-rise buildings and industrial facilities to homes and transportation networks. To maintain safety, reliability, and efficiency within this complex electrical ecosystem, Singapore has established a robust regulatory framework overseen by the Energy Market Authority (EMA). At the heart of this framework is the Licensed Electrical Worker (LEW) — a certified professional responsible for designing, installing, maintaining, and inspecting electrical installations to ensure compliance with national safety standards.

The LEW certification in Singapore is not just a legal requirement — it’s a critical safeguard. Whether you’re developing new infrastructure or managing an existing building, engaging a LEW is mandatory when applying for or renewing an electrical installation licence. Building LEWs are particularly essential in commercial and industrial settings, where electrical loads are high and safety risks are magnified.

Statistics from the Singapore Civil Defence Force (SCDF) reveal that electrical faults remain a significant cause of fires. In 2024, SCDF responded to 1,990 fire incidents, with a notable portion attributed to electrical wiring or appliances. These incidents resulted in injuries and fatalities, underscoring the importance of proper electrical safety measures. Regular inspections and maintenance by licensed professionals help detect and rectify electrical defects early, thereby reducing the risk of fire and other hazards

This complete guide will walk you through everything you need to know about becoming or engaging a licensed electrical worker in Singapore. We’ll explore the different types of LEW licences, the LEW Singapore application process, eligibility criteria, responsibilities across residential and commercial settings, and key compliance regulations — including what to expect during EMA licence renewal. Whether you’re a building owner, facility manager, or aspiring LEW, this article will help you understand your obligations and ensure safe, uninterrupted power for your premises.

 

What is a Licensed Electrical Worker (LEW)?

A Licensed Electrical Worker (LEW) is an individual certified by Singapore’s Energy Market Authority (EMA) to carry out specific types of electrical work based on their license class. Under the Electricity Act, LEWs are legally authorised to design, install, test, maintain, repair, inspect, and certify electrical installations. Their role is vital in ensuring that electrical systems meet strict regulatory and safety standards, both in residential and commercial premises.

The LEW licence comes in three classes — Electrician, Electrical Technician, and Electrical Engineer — each with varying scopes of responsibility based on qualifications and experience. All licensed electrical workers must adhere to the Electricity (Electrical Workers) Regulations, which define the boundaries of their duties and outline penalties for non-compliance.

LEWs hold legal authority to submit technical documents and applications to EMA, such as for electrical installation licences, load changes, or EMA licence renewals. Their signature is mandatory on certain compliance certificates, and only an LEW can take charge of or supervise the operation of electrical installations exceeding specified loads (e.g., 45 kVA). This positions them as a gatekeeper in Singapore’s energy safety infrastructure.

It’s important to distinguish LEWs from other electrical professionals. While general electricians may carry out minor wiring or maintenance tasks, they cannot legally handle, inspect, or approve works that fall under EMA’s regulatory scope unless they are a certified licensed electrical worker. This distinction is crucial for building LEWs, who often assume responsibility for entire premises, especially in commercial or industrial buildings.

In short, a LEW is not just a technical expert — they are a licensed authority figure within Singapore’s highly regulated electricity landscape. Whether you’re managing a property or aspiring to join the profession, understanding the LEW’s role is essential to staying compliant and safe.

Types of LEW Licences in Singapore

In Singapore, the Licensed Electrical Worker (LEW) certification is tiered into three main grades, each authorising the holder to undertake different levels of electrical work based on system voltage, complexity, and scale. These licences are administered by the Energy Market Authority (EMA) and are a critical part of ensuring national electrical safety standards are upheld.

LEW Grade 7 – Electrician Licence

Scope:
An electrician’s licence entitles the holder to design, install, repair, maintain, operate, inspect, and test an electrical or supply installation where the operating voltage does not exceed 1000 volts and the approved load does not exceed 45 kVA. The licence also allows the holder to install, repair, maintain, and operate, under the supervision of an electrical technician, an electrical or supply installation where the operating voltage does not exceed 1000 volts and the approved load is more than 45 kVA but does not exceed 500 kVA. In addition, the holder may carry out any work as instructed by, or under the supervision of, an authorised high voltage switching engineer.

Qualifications Required:

• possesses a National Institute of Technical Education Certificate which curriculum is relevant to the electrical work which an electrician is authorised to perform or such other qualification as may be acceptable to the Authority; and has not less than 2 years practical experience in Singapore relevant to the electrical work which an electrician is authorised to perform; or
• has not less than 10 years practical experience in Singapore relevant to the electrical work which an electrician is authorised to perform; or
• has not less than 5 years practical experience in Singapore relevant to the electrical work which an electrician is authorised to perform; and has successfully completed a course of instruction specified on the approved courses webpage that is relevant to the electrical work which an electrician is authorised to perform; or
• had been registered as an electrical contractor by the Public Utilities Board before 1st January 1975.]
  

Limitations:

• Voltage Limitation: The licence only permits work on electrical installations with an operating voltage not exceeding 1000 volts. Any work on high-voltage systems above 1000 volts is beyond the scope of this licence.
• Load Limitation: The licence allows independent work only on installations with an approved load up to 45 kVA. For installations with loads exceeding 45 kVA but up to 500 kVA, work must be carried out under the supervision of an electrical technician.
• High-Voltage Work: The licence does not permit independent high-voltage work; any such work must be performed under the instruction or supervision of an authorised high-voltage switching engineer.
  
• Electrical Installation License: Electricians are not authorised to certify electrical plans for submission to the EMA and cannot take charge of an Electrical Installation License.

LEW Grade 8 – Electrical Technician Licence

Scope:

An electrical technician’s licence entitles the holder to install, repair, maintain, operate, inspect, and test an electrical installation where the operating voltage does not exceed 1000 volts and the approved load does not exceed 500 kVA. The licence also allows the holder to design and submit plans and drawings for an electrical installation where the operating voltage does not exceed 1000 volts and the approved load does not exceed 150 kVA, except that the 1000-volt limitation does not apply to Electric Discharge Lighting Circuits. In addition, the licence permits the holder to carry out any work or switching operation as instructed by, or under the supervision of, an authorised high voltage switching engineer.

Qualifications Required:

• possesses a diploma majoring in electrical power engineering relevant to the electrical work which an electrical technician is authorised to perform, or such other qualification as may be acceptable to the Authority; and has not less than 2 years practical experience in Singapore relevant to the electrical work which an electrical technician is authorised to perform; or
• possesses a diploma majoring in electrical power engineering relevant to the electrical work which an electrical technician is authorised to perform, or such other qualification as may be acceptable to the Authority; and has not less than one year practical experience in Singapore relevant to the electrical work which an electrical technician is authorised to perform; and has successfully completed a course of instruction specified on the approved courses webpage that is relevant to the electrical work which an electrical technician is authorised to perform; or
• possesses an electrician’s licence; and has not less than 5 years practical experience in Singapore relevant to the electrical work which an electrician is authorised to perform, beginning on the date the electrician’s licence was issued to him; and has successfully completed a course of instruction specified on the approved courses webpage that is relevant to the electrical work which an electrical technician is authorised to perform.
  

Limitations:

• Voltage Limitation: The licence generally restricts work to electrical installations with an operating voltage not exceeding 1000 volts, except for Electric Discharge Lighting Circuits, which are exempt from the 1000-volt limitation.
• Load Limitation: The licence permits independent work on installations with loads up to 500 kVA. For designing and submitting plans, the approved load must not exceed 150 kVA.
• High-Voltage Work: The licence holder cannot perform high-voltage switching independently; any such work must be carried out under the instruction or supervision of an authorised high-voltage switching engineer.
• Electrical Installation License: Technicians are authorised to take charge of an Electrical Installation License up to 500kVA.

LEW Grade 9 – Electrical Engineer Licence

Scope:
An electrical engineer’s licence entitles the holder to design, install, repair, maintain, operate, inspect, test, and take full charge and responsibility for any electrical installation up to the limits specified in their licence. The licence includes specific operating voltage restrictions, which may range from up to 1,000 volts, 22,000 volts, 66,000 volts, 230,000 volts, or 400,000 volts, or may be restricted to particular types of installations.

Qualifications Required:

• is a registered professional engineer in electrical engineering under the Professional Engineers Act (Cap. 253); and
• has not less than 2 years’ post-graduate experience in Singapore in electrical power engineering relevant to the electrical work which an electrical engineer is authorised to perform.

Limitations:

• Voltage Limitation: The licence holder can only work within the voltage range specified on their licence, which may be up to 1,000 V, 22,000 V, 66,000 V, 230,000 V, 400,000 V, or limited to particular installations.
• High-Voltage Work: the licence holder can perform high-voltage switching independently only within their authorised voltage limit; any work beyond this limit must be carried out under the instruction or supervision of an authorised high-voltage switching engineer.
• Electrical Installation License: Engineers can only take charge of an electrical installation license within the voltage limits specified on their licence.

Electrically Trained Person vs. LEW– Key Differences

An Electrically Trained Person is generally someone who is capable of carrying out electrical installation works and is knowledgeable about avoiding electrical hazards; however, not all of them are Licensed Electrical Workers (LEWs). An LEW is a legal designation under the Energy Market Authority (EMA), whereas an electrically trained person is only permitted to perform electrical installation works under the supervision of an LEW of the appropriate grade. In addition, only LEWs of Grade 8 and Grade 9 are authorised to take charge of Electrical Installation (EI) licences.

Understanding the scope and requirements of each LEW license helps building owners, developers, and aspiring LEWs navigate the right professional path — and ensure safe, compliant installations aligned with EMA regulations.

The LEW Certification Process

Becoming a Licensed Electrical Worker (LEW) in Singapore is a structured and regulated process overseen by the Energy Market Authority (EMA). Whether you’re aiming to obtain a Grade 7 Electrician Licence or progress to a Grade 9 Electrical Engineer Licence, the certification path is designed to ensure only qualified, experienced individuals are licensed to manage electrical systems in the country. Below is a detailed guide to the full LEW application process, from prerequisites to final approval.

Educational Requirements and Prerequisites

Each LEW grade has distinct educational and professional prerequisites:

• 7 – Electrician:
  • possesses a National Institute of Technical Education Certificate which curriculum is relevant to the electrical work which an electrician is authorised to perform or such other qualification as may be acceptable to the Authority; and has not less than 2 years practical experience in Singapore relevant to the electrical work which an electrician is authorised to perform; or
  • has not less than 10 years practical experience in Singapore relevant to the electrical work which an electrician is authorised to perform; or
  • has not less than 5 years practical experience in Singapore relevant to the electrical work which an electrician is authorised to perform; and has successfully completed a course of instruction specified on the approved courses webpage that is relevant to the electrical work which an electrician is authorised to perform; or
  • had been registered as an electrical contractor by the Public Utilities Board before 1st January 1975.]
• 8 – Electrical Technician:
  • possesses a diploma majoring in electrical power engineering relevant to the electrical work which an electrical technician is authorised to perform, or such other qualification as may be acceptable to the Authority; and has not less than 2 years practical experience in Singapore relevant to the electrical work which an electrical technician is authorised to perform; or
  • possesses a diploma majoring in electrical power engineering relevant to the electrical work which an electrical technician is authorised to perform, or such other qualification as may be acceptable to the Authority; and has not less than one year practical experience in Singapore relevant to the electrical work which an electrical technician is authorised to perform; and has successfully completed a course of instruction specified on the approved courses webpage that is relevant to the electrical work which an electrical technician is authorised to perform; or
  • possesses an electrician’s licence; and has not less than 5 years practical experience in Singapore relevant to the electrical work which an electrician is authorised to perform, beginning on the date the electrician’s licence was issued to him; and has successfully completed a course of instruction specified on the approved courses webpage that is relevant to the electrical work which an electrical technician is authorised to perform.
• 9 – Electrical Engineer:
  • is a registered professional engineer in electrical engineering under the Professional Engineers Act (Cap. 253); and
  • has not less than 2 years’ post-graduate experience in Singapore in electrical power engineering relevant to the electrical work which an electrical engineer is authorised to perform.
    

In all cases, candidates must be conversant with Singapore’s electricity regulations and electrical installation codes.

Application Process with the Energy Market Authority (EMA)

Applicants must submit their LEW application through the EMA’s e-Licensing portal, along with the following:

• Completed LEW application form
  
• Certified true copies of academic qualifications
  
• Detailed resume of work experience
  
• Employer testimonials (verifying scope and duration of relevant work)
  
• Passport-sized photograph
  
• Application fee (non-refundable)
  

EMA reviews the documentation and notifies applicants if they are eligible to proceed to the assessment stage.

Examination and Assessment Procedures

If shortlisted, candidates are invited to undergo an LEW examination, which includes:

1. Written Test – Technical knowledge, safety regulations, and Singapore Standards
   
2. Interview Panel – Practical experience assessment and case-based questioning
   
3. Site Assessment (for 8 and 9) – Demonstrate ability to supervise and inspect electrical installations
   

Passing all components is mandatory for certification.

Costs and Timeline Expectations

Estimated Fees:
The certification process involves fees for application, assessments, and licensing. While exact amounts vary, applicants should budget for course fees, application fees, and examination costs. 

According to the EMA website, the following are the expected prices for the relevant purchases of:

1. Application Fee: $50 (non-refundable)

2. Licence Fee: $30

Timeline Overview:

• Application review: 4–6 weeks
  
• Exam scheduling: 1–2 months after approval
  
• Final results and license issuance: ~3 months total (longer for L3)
  

Aspiring LEWs should budget at least 3–6 months from application to certification, depending on their grade and scheduling availability.

Common Reasons for Application Rejection

Not all LEW applications are successful on the first attempt. Common rejection reasons include:

• Incomplete or inaccurate documentation
  
• Insufficient relevant experience for the licence grade applied
  
• Academic qualifications not recognised by EMA
  
• Failure to demonstrate compliance knowledge during the interview
  
• Falsified work history or employer endorsements

To avoid delays, applicants should ensure that all information is truthful, complete, and in alignment with EMA guidelines

Key Responsibilities of a Licensed Electrical Worker

A Licensed Electrical Worker (LEW) is not merely a technician or engineer — they are a critical enforcer of electrical safety and compliance in Singapore. Under the Electricity Act and EMA regulations, LEWs hold specific legal responsibilities that directly impact public safety, system reliability, and regulatory adherence. These duties vary slightly by licence grade but follow core themes that ensure every electrical installation — from homes to data centres — meets national standards.

Electrical Installation Design Approval

Before any major electrical work begins, LEWs — especially those holding Grade 9 licences — are often required to review and approve electrical installation designs. This involves:

• Ensuring system load calculations are accurate
• Verifying that proposed wiring layouts comply with Singapore Standards (e.g., SS 638)
• Evaluating protective systems like circuit breakers, earth leakage devices, and surge protection
• Confirming system suitability for its intended environment (e.g., wet rooms, high heat zones)

LEWs must sign off on electrical plans when applying for or modifying an electrical installation licence, particularly in building LEW scenarios for commercial properties.

Safety Certification and Compliance Documentation

One of the LEW’s core responsibilities is to issue the Certificate of Compliance (COC) — a document verifying that all electrical works comply with regulatory standards and are safe to operate. This certification is required:

• When commissioning a new installation
• After upgrading the electrical loads
  

A LEW’s endorsement is legally binding, and improper certification can lead to regulatory penalties, licence suspension, or criminal charges.

Supervision of Electrical Work

A licensed electrical worker in Singapore must supervise installation, maintenance, or modification work depending on the project’s complexity and the licence held. This supervision includes:

• Overseeing contractors to ensure safe work practices
• Intervening when unauthorised changes are made
• Preventing the use of non-compliant materials or techniques
• Ensuring proper grounding, insulation, and load balancing

Supervision becomes especially critical in high-voltage environments, where the margin for error is extremely slim.

Inspection and Testing Requirements

Before an installation can be energised, it must undergo comprehensive inspection and testing conducted or supervised by a LEW. 

LEWs are also responsible for routine testing of existing systems, particularly in commercial buildings, factories, and healthcare facilities. The results must be documented and made available for EMA audits or safety reviews.

Record-Keeping and Reporting Obligations

Good documentation is a regulatory requirement for every LEW Singapore licensee. Licensed electrical workers must maintain detailed records of:

• Installation schematics and load calculations
  
• Test reports and inspection logs
  
• Certificates of Compliance issued
  
• Incident reports and corrective actions taken
  

Additionally, LEWs are obligated to report any electrical accidents or dangerous occurrences to EMA immediately. Failure to do so may result in licence revocation or legal action.

For corporate facilities, these records are often reviewed during annual electrical installation licence renewals. Having a thorough and accessible archive ensures smoother regulatory audits and supports workplace safety.

In summary, the duties of a licensed electrical worker extend far beyond technical know-how. They are trusted professionals with legal accountability for the safety and compliance of electrical systems. Whether approving designs, issuing certifications, supervising works, or maintaining meticulous records, LEWs play a crucial role in upholding Singapore’s electrical safety standards.

LEW Licence Renewal Process

Renewal Timeline and Requirements

LEW licence holders receive a renewal notice approximately six weeks before the licence expiry date. Although since August 2014, LEW licences are issued with lifetime validity, existing licences are converted to lifetime status upon renewal. Despite lifetime validity, LEWs must still comply with periodic requirements such as refresher courses and medical certification to keep their licences active. Renewal applications must be submitted at least one month before the expiry date to avoid lapses.

Common Challenges Faced by LEWs in Singapore

Licensed Electrical Workers (LEWs) in Singapore operate within a complex and evolving regulatory and operational environment. While their expertise is critical to electrical safety and compliance, LEWs face several challenges that require continuous adaptation and professional diligence.

Keeping Up with Changing Regulations

One of the foremost challenges for LEWs is staying abreast of frequent updates to electrical safety codes, standards, and regulations. The Energy Market Authority (EMA) regularly revises guidelines to address emerging technologies and safety concerns. LEWs must continuously update their knowledge through refresher courses and self-study to ensure that their work complies with the latest requirements. Failure to keep up can result in non-compliance, safety risks, and potential legal consequences. As Gowri Kunasegaran from EMA’s Inspectorate Department points out, even when installations are done by LEWs, issues such as power trips may arise from complex causes, underscoring the need for ongoing technical vigilance1.

Managing Liability and Insurance Requirements

LEWs bear significant legal responsibility for the safety and compliance of their electrical works. This liability extends to third-party injuries, property damage, and legal costs arising from electrical faults or accidents. To mitigate financial risks, many LEWs must secure comprehensive general liability insurance, which covers personal injury, property damage, legal expenses, and other liabilities. Navigating insurance coverage options and ensuring adequate protection can be complex and costly, especially for small contractors or independent LEWs2.

Coordination with Other Building Professionals

Electrical work rarely occurs in isolation; LEWs must coordinate closely with architects, engineers, contractors, and building management to ensure seamless integration of electrical systems within broader construction or renovation projects. This collaboration demands clear communication, scheduling alignment, and understanding of multidisciplinary requirements. Delays or miscommunication can lead to project overruns, compliance issues, or rework. LEWs must also navigate regulatory approvals and landlord or Management Corporation Strata Title (MCST) permissions, particularly in commercial and industrial settings34.

Case Study: Real-World Challenges and Solutions

At I2R Consulting & Engineering Services, a team of LEWs encountered a partial discharge anomaly during routine ultrasonic testing of a dry-type transformer at a client’s facility. Detecting this early electrical fault required swift coordination to safely shut down the transformer, conduct detailed inspections, and implement corrective measures without disrupting critical operations. The LEWs performed load profile trending to identify alternative power sources and carefully managed switching operations to minimise downtime. This case highlights the technical complexity and operational challenges LEWs face and their role in proactive risk management.

Working With a LEW: Guidelines for Building Owners

When is a LEW Required for Your Project?

Under the Electricity Act 2001, all electrical works, whether in residential, commercial, or industrial premises, must be carried out or supervised by a Licensed Electrical Worker unless explicitly exempted. This includes installation, repair, maintenance, and inspection of electrical systems. Projects involving new wiring, upgrading electrical capacity, or altering existing electrical installations require a LEW’s involvement. For large-scale projects or those with an approved load exceeding 45kVA, engaging a LEW is mandatory to handle design submissions, approvals, and compliance certification with the Energy Market Authority (EMA).

How to Verify a LEW’s Credentials

Building owners should verify the credentials of any LEW before engagement to ensure they are properly licensed and authorised. The Energy Market Authority’s ELISE portal provides a public search tool where owners can check the validity of a LEW’s licence by name or licence number. All licensed electrical workers are issued official licence cards, which should be requested for verification. Engaging only licensed professionals mitigates risks associated with unqualified electrical work and ensures compliance with safety standards.

What Documentation to Expect from Your LEW

A qualified LEW will provide comprehensive documentation throughout the project lifecycle, including:

• Electrical design drawings and plans for approval (especially for larger or complex installations).
• Application submissions to relevant authorities such as SP Group or Building LEWs for connection and energization permissions.
• Inspection and testing reports certifying that the installation complies with safety regulations.
• Certificate of Compliance (CoC) or Statement of Turn-On (SOTO) forms confirming the electrical system is safe and ready for use.
• Copies of all permits, approvals, and correspondence with authorities related to the electrical work.

These documents are crucial for legal compliance, future maintenance, and insurance purposes.

Typical Costs and Engagement Timeline

Electrical work costs vary widely depending on project scope, company, complexity, and urgency.  Engagement timelines depend on the project scale but generally involve initial consultation, design and approval submissions, installation, inspection, and final certification. For larger projects, coordination with multiple stakeholders and regulatory bodies may extend timelines.

Conclusion

In summary, Singapore’s Licensed Electrical Worker (LEW) framework is a critical pillar in ensuring electrical safety, regulatory compliance, and the reliable operation of electrical systems across residential, commercial, and industrial sectors. The structured licensing system, comprising Grades 7, 8, and 9, ensures that qualified professionals perform electrical work with the appropriate expertise and authority. LEWs carry significant responsibilities—from design approval and supervision to inspection, certification, and record-keeping—safeguarding lives and property.

Proper licensing not only protects building owners and occupants but also upholds Singapore’s high safety standards and minimises electrical incidents. With ongoing regulatory updates and the integration of smart technologies, the role of LEWs continues to evolve, demanding continuous learning and adherence to best practices.

For individuals considering a career as a Licensed Electrical Worker, pursuing certification is a valuable investment in professional credibility and safety competence. Building owners and project managers are encouraged to engage only licensed electrical professionals to ensure compliance and peace of mind.

Take the first step today by exploring the LEW certification process or verifying licensed professionals for your electrical projects—because electrical safety starts with qualified expertise.

About I2R Consulting

I2R Consulting is a leading engineering consultancy in Singapore, specialising in LEW services, regulatory compliance, and energy system optimisation. With a team of licensed electrical workers across all grades (7, 8 & 9), we support commercial, industrial, and institutional clients in achieving safe, efficient, and fully compliant electrical installations.

Our expertise spans LEW certification, electrical installation license applications, inspection, testing, and EMA license renewal support. Backed by decades of experience and deep regulatory insight, I2R is your trusted partner in navigating Singapore’s complex electrical landscape.

Contact us at +65 6203 1242 or contact@i2r.com.sg for a consultation.