SIT Learn
SIT Learn


Singapore standard SS 638:2018 is the new Code of Practice for Electrical Installations. This Code is a major revision of Singapore Standard CP5: 1998. This new Code is a modified adoption of BS 7671: 2008 (the 17th Edition of IET Wiring Regulations). All LV electrical installations in Singapore, as mandated by the Energy Market Authority, must comply with the provisions of the Code to ensure safety, especially from electric shock and fire in the use of electricity and relates principally to the design, selection, erection, inspection and testing of electrical installations.

This 3-day course will be delivered in a combination of lectures, class discussions, case studies and design exercises that are mainly drawn from the instructor’s consulting work. You will learn the correct interpretation and application of SS 638 through many authentic design examples.

At the end of this 3-day course, you will be able to:

  • Identify and interpret the new provisions in SS 638: 2018
  • Apply the regulations in SS 638:2018
  • Assess the general characteristics and particular requirements of an electrical installation
  • Design electrical installations with appropriate earthing and bonding for protection against electric shock
  • Select and size cables based on current-carrying capacity and voltage drop calculations
  • Design for protection against overcurrent and faults
  • Conduct LV inspection and testing to comply with the code requirements

Speakers / Trainers

What You’ll Learn

  • Background to SS 638: 2018 and CP 5
  • Object and effects
  • Structure and numbering system
  • Fundamental requirements for safety
  • Identifying Codes, Terminology & Definitions

Assessment of General Characteristics
  • Purpose, supplies and structures
  • Conductor arrangement and system earthing
  • Maximum demand and diversity
  • Supplies for safety services and standby system
  • External influences
  • Electromagnetic compatibility
  • Reliability & availability considerations
  • Single-point failure consideration
  • Maintainability/li>
  • Case studies/examples

Protection for Safety
  • Protection against electric shock
  • Protection measures: earthed equipotential bonding and automatic disconnection
  • Protection measures: double or reinforced insulation
  • Protection measures: electrical separation
  • Protection measures: extra-low voltage provided by SELV or PELV
  • Protection against fire caused by electrical equipment
  • Protection against burns
  • Case studies/examples

Protection against Overcurrent and Fault Current
  • Characteristics of protective devices
  • Protection against overload current
  • Protection against fault current
  • Protection against both overload and fault current
  • Coordination between conductor and overload protective devices
  • Calculation of fault current
  • Coordination of overload current and fault current protection
  • Nature and characteristics of earth faults
  • Maximum permissible earth fault loop impedance
  • Calculation of touch voltage
  • Calculation of earth fault loop impedance, with examples
  • Calculation of protective conductor cross-sectional areas, with examples

Selection, Sizing and Erection of Wiring Systems
  • Selection and erection of wiring systems
  • Current-carrying capacities of cables
  • Sizing of cross-sectional areas of conductors
  • Calculation of voltage drop – approximate and accurate method
  • Effects of power factor on voltage drop calculation
  • Current-carrying capacity and voltage drop for busbar trunking system
  • Selection and erection of wiring systems to minimize the spread of fire
  • Earthing arrangement and protective conductors
  • Case studies/examples

Protection, Isolation, Switching, Control and Monitoring
  • Definition and principles
  • General and common requirements
  • Devices for fault protection by automatic disconnection
  • Devices for protection against the risk of fire
  • Devices for protection against overcurrent
  • Devices for protection against overvoltage
  • Devices for protection against undervoltage
  • Isolation requirements and appropriate devices
  • Switching off for mechanical maintenance and appropriate devices
  • Emergency switching & appropriate devices
  • Functional switching and appropriate devices
  • Lock-out, tag-out procedure

Inspection and Testing
  • Purpose of Initial verification
  • Initial inspection and checklist
  • Initial testing: continuity, insulation resistance, polarity, phase sequence, earth electrode resistance, prospective fault current, voltage drop, operational and functional testing of RCDs, EMF
  • Requirements for periodic inspection and testing
  • Periodic inspection checklist
  • Periodic testing
  • Electrical installation condition report
  • Test instruments and equipment
  • Demonstration of test equipment

Overview of Other Requirements
  • Temporary electrical installations
  • Low voltage generating sets
  • Electric vehicle charging system
  • Solar photovoltaic (PV) power supply system

Electrical Design Process and Considerations
  • Plant equipment and their requirements
  • Maximum demand and diversity
  • External influences and compatibility
  • Power quality and EMC requirements
  • Power factor correction
  • Circuit arrangements
  • Maintainability
  • Reliability and availability considerations
  • Single-point failure consideration
  • Mission-critical power requirements
  • Safety services
  • Energy-efficient design

Design Exercise 1
Design of a final circuit incorporating cable sizing and fault calculation and Design of a simple installations
Design Exercise 2
Design of electricity distribution system for a commercial mixed development with a 6-storey shopping mall and an 18-storey office tower

Who Should Attend

  • Electrical engineers
  • Engineers preparing for professional examinations
  • LEWs
  • Project engineers and site supervisors of electrical projects
  • Designers and specifiers of electrical installations
  • Electrical contractors and installers
  • Plant and facility engineers
  • Technical personnel working in inspection and testing of electrical equipment

SITizens Learning Credits (SLC) - Eligible Course

SIT Alumni: Before registering for courses, please activate your SITizens Learning Credits via the email sent by SIT Alumni Team, on behalf of SITLEARN Professional Development on 31 Jan 2019.

CLICK HERE TO APPLY (only for SIT Alumni)

Registration closes on 24/06/19

Certificate and Assessment

A Certificate of Participation will be issued to participants who:
  • Attend 75% of the course
  • Undertake non-credit bearing assessment (during course)


Participants should have fundamental knowledge in electrical engineering in order to gain full benefits from the course.

Course Materials

You will receive:
  • A copy of SS638:2018 worth S$147.40
  • A comprehensive set of course notes
  • Other reference materials


Date Duration Venue
15 - 17 Jul 2019 3-day SIT@Dover, 10 Dover Drive, Singapore 138683


Category Full Fee After SF Funding After SF Mid-Career
Enhanced Subsidy
Singapore Citizen (Below 40) / Singapore PR $2,889.00 $866.70 Not Eligible
Singapore Citizen (40 & above) $2,889.00 $866.70 $326.70
Non-Singaporeans $2,889.00 Not Eligible Not Eligible

  • All figures include GST. GST applies to individuals and Singapore-registered companies.
  • You can opt for either SkillsFuture Funding or Mid-Career Enhanced Subsidy. Both cannot be combined.

» Learn more about funding types available

Terms & Conditions:

SkillsFuture Course Funding

To be eligible for the 70% training grant awarded, applicants (and/or their sponsoring organisations where applicable) must:
  1.  Be a Singaporean Citizen or Singapore Permanent Resident
  2.  Not receive any other funding from government sources in respect of the actual grant disbursed for the programme

SkillsFuture Mid-Career Enhanced Subsidy

To be eligible for the 90% enhanced subsidy awarded, applicants (and/or their sponsoring organisations where applicable) must:
  1.  Be a Singaporean Citizen
  2.  Be at least 40 years old
  3.  Not receive any other funding from government sources in respect of the actual grant disbursed for the programme

SIT reserves the right to collect the balance of the course fees (i.e. the potential grant amount) directly from the applicants (and/or their sponsoring organisations where applicable) should the above requirements not be fulfilled.

SIT reserves the right to make changes to published course information, including dates, times, venues, fees and instructors without prior notice.

Key Info

Venue SIT@Dover, 10 Dover Drive, Singapore 138683
Time 08:30 AM to 05:30 PM
Date 15 Jul 2019 (Mon)
17 Jul 2019 (Wed)

Apply Now

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