Guides & Insights
Practical, no-nonsense guides on calibration, choosing the right instrument, electrical safety, predictive maintenance and compliance — written by Singapore's test & measurement specialists.
How to Use a Digital Multimeter Safely: Complete Step-by-Step Guide
A digital multimeter is the most versatile instrument in any electrician's toolkit, but incorrect use can be lethal. This guide covers every safety step, from selecting the right CAT-rated meter to reading voltage, current and resistance correctly in Singapore workplaces.
Read articleInsulation Resistance Testing (Megger Test): Complete Practical Guide
Insulation resistance testing (commonly called the Megger test), applies a DC high voltage to electrical insulation and measures the leakage current to calculate resistance in megaohms. This guide covers correct test voltages, minimum acceptable values, the Polarisation Index, and how Singapore's SS 638 and MOM requirements apply.
Electrical SafetyEarth Continuity Testing: Methods, Standards and Acceptable Values
Earth continuity testing verifies that a continuous, low-resistance path exists between exposed metalwork and the earth bar. The critical safety bond that ensures protective devices operate quickly during a fault. This guide covers the two main test methods, acceptable resistance values under SS 638, and the instruments used in Singapore.
Electrical SafetySS 638 Electrical Installation Testing in Singapore: Requirements and Equipment
SS 638 is Singapore's Code of Practice for Electrical Installations and sets the mandatory testing requirements for all new, altered, and periodically inspected electrical installations. This guide explains every required test, who is legally authorised to perform them, and what instruments you need to comply.
Electrical SafetyPower Factor Measurement and Correction: A Practical Guide
Power factor measures how efficiently your electrical system converts apparent power (kVA) drawn from the grid into useful real power (kW). A low power factor increases your SP Group electricity bill through reactive power charges, overloads cables and transformers, and signals underlying power quality problems. This guide explains how to measure power factor correctly and what to do about it.
Electrical SafetyMotor Winding Testing: Methods, Instruments and Pass/Fail Criteria
Motor winding failures account for a large proportion of unplanned electrical downtime in Singapore's industrial facilities. Testing motor windings with the right instruments and interpreting results correctly can predict and prevent most motor failures before they cause costly shutdowns. This guide covers every test from basic insulation resistance to surge comparison testing.
Electrical SafetyHigh Voltage Safety Testing: Equipment, Methods and Singapore Regulations
High voltage testing (including dielectric withstand (hipot) tests, partial discharge measurement, and HV insulation resistance), verifies the integrity of insulation systems in cables, transformers, switchgear, and electrical apparatus that operate at voltages above 1000 V AC. In Singapore, HV work is strictly regulated by EMA and MOM WSH legislation.
Electrical SafetyRCD Testing (Residual Current Device): How to Test and What Passes
Residual current devices (RCDs) are the primary safeguard against electric shock in Singapore's domestic and commercial buildings, but only if they function correctly. RCDs must be tested at commissioning and periodically thereafter to verify trip times meet SS 638 requirements. This guide explains the complete testing procedure, pass/fail criteria, and RCD types.
Electrical SafetyBattery Testing and Maintenance: State of Health and Load Testing
Batteries in UPS systems, emergency lighting, fire alarm panels, and standby power supplies are often the last line of defence during a mains failure, and the most neglected part of any electrical installation. This guide covers how to test battery state of health, load test UPS batteries, and maintain VRLA and flooded lead-acid batteries in Singapore's climate.
Electrical SafetyGenerator Testing and Commissioning in Singapore: A Field Guide
Diesel generators and gas gensets are the backbone of emergency and standby power in Singapore's hospitals, data centres, commercial buildings, and industrial facilities. Testing and commissioning a generator correctly (under load, with all protection systems verified), is essential to ensure it will start and sustain critical loads during an actual mains failure.
Electrical SafetyConstruction Site Electrical Testing Singapore: Tools and Compliance for BCA and MOM
Singapore's construction sector operates under BCA and MOM Workplace Safety and Health (WSH) regulations requiring systematic electrical testing of temporary and permanent installations. This guide covers the instruments and testing requirements for Singapore's building contractors and M&E engineers.
Electrical SafetyHow to Test Earth Ground Resistance in Singapore: Step-by-Step Guide
Earth ground resistance testing verifies that your grounding system will safely conduct fault currents and lightning strikes to earth. This step-by-step guide covers three test methods (fall-of-potential, selective, and clamp-on), using the Fluke 1625-2 for Singapore electrical and lightning protection applications.
Electrical SafetyPower Quality Analysis Explained
Unexplained tripping, overheating, flickering and equipment failures are often power-quality problems. A power logger captures what a multimeter cannot. Here is what to look for.
Electrical SafetyCAT III and CAT IV Safety Ratings Explained
The CAT rating on a meter is a safety specification, not a feature. It tells you the transient overvoltage the instrument is built to survive in a given location. Here is how to read it correctly.