Three Phase Testing
Specialist testing for three-phase equipment, machinery, and industrial installations.
Overview
What is Three Phase Testing?
Our three-phase testing service covers industrial machinery, motors, welders, compressors, and heavy equipment that operates on three-phase power. Three-phase systems carry higher voltages and currents than standard single-phase equipment, requiring specialist test equipment and trained technicians. We perform insulation resistance testing, earth continuity verification, phase balance checks, and running current measurements to ensure your heavy equipment is safe and compliant.
100%
AS/NZS 3760 Compliant
24hr
Report Delivery
Full
Digital Records
Local
Perth Team
Why It Matters
Why Three Phase Testing matters
Three-phase equipment operates at higher voltages, making faults more dangerous.
Industrial equipment is subject to extreme conditions — vibration, heat, dust, and moisture.
Phase imbalances can cause motor overheating, premature failure, and fire.
Regular testing prevents costly unplanned downtime and equipment replacement.
Common Faults
What we commonly find
These are the most common faults found during three phase testing inspections in Perth workplaces.
Failed insulation resistance
Risk: Current leaking between conductors and earth, potential shock/fire hazard.
Equipment removed from service for repair.
Phase imbalance
Risk: Motor overheating, premature bearing failure, reduced efficiency.
Electrical supply investigated and balanced.
Overloaded cables
Risk: Cable overheating, insulation melting, fire risk.
Load redistributed or cable upgraded.
Damaged connectors
Risk: Exposed live conductors, arc flash risk.
Connector replaced on-site.
Inspection & Testing Intervals
Recommended inspection and testing frequencies based on AS/NZS 3760 for different workplace environments and equipment types.
CAUTION
This information should be read together with the AS/NZS 3760 standard as a whole, particularly Clause 2.1. Inspection intervals vary depending on equipment type and operating environment.
| Type of Environment and/or Equipment | Test & Tag (Class I, Class II, Cord Sets, Extension Leads, EPODs) | Interval Between Inspection and Tests | |||
|---|---|---|---|---|---|
| Residual Current Devices (RCDs) — Push Button Test by User | Residual Current Devices (RCDs) — Operating Time & Push Button Test | ||||
| Portable (c) | Fixed (d) | Portable (e) | Fixed (f) | ||
Factories Workshops, Places of repair, Manufacturing, Assembly, Maintenance, Fabrication Industrial workplaces | Every 6 Months | Daily / Before Every Use | Every 6 Months | Every 12 Months | Every 12 Months |
Equipment where the flexible cord is subjected to flexing during normal use OR is open to abuse OR used in hostile environments. Construction, mining, demolition, workshops | Every 12 Months | Every 3 Months | Every 6 Months | Every 12 Months | Every 12 Months |
Equipment where the supply flexible cord is NOT subjected to flexing in normal use and is NOT open to abuse and NOT used in hostile environments. Office equipment | Every 5 Years | Every 3 Months | Every 6 Months | Every 2 Years | Every 2 Years |
Residential areas Hotels, Motels, Boarding Houses, Accommodation, Residential Institutions Residential & accommodation | Every 2 Years | Every 6 Months | Every 6 Months | Every 2 Years | Every 2 Years |
Equipment used for Commercial Cleaning Cleaning contractors | Every 6 Months | Daily / Before Every Use | N/A | Every 6 Months | N/A |
Hire Equipment Equipment supplied on hire Inspection | Prior to Hire | Including push-button test by hirer before hire | N/A | N/A | |
Hire Equipment Equipment supplied on hire Test & Tag | Every 3 Months | N/A | N/A | Every 3 Months | Every 12 Months |
Repaired, Serviced & Second-hand Equipment Before return to service | After repair or service which could affect electrical safety, or before reintroduction into service, refer to AS/NZS 5762. | ||||
Factories
Workshops, Places of repair, Manufacturing, Assembly, Maintenance, Fabrication
Industrial workplaces
Test & Tag
Every 6 MonthsPort. Push Button
Daily / Before Every UseFix. Push Button
Every 6 MonthsPort. Op. Time
Every 12 MonthsFix. Op. Time
Every 12 MonthsEquipment where the flexible cord is subjected to flexing during normal use OR is open to abuse OR used in hostile environments.
Construction, mining, demolition, workshops
Test & Tag
Every 12 MonthsPort. Push Button
Every 3 MonthsFix. Push Button
Every 6 MonthsPort. Op. Time
Every 12 MonthsFix. Op. Time
Every 12 MonthsEquipment where the supply flexible cord is NOT subjected to flexing in normal use and is NOT open to abuse and NOT used in hostile environments.
Office equipment
Test & Tag
Every 5 YearsPort. Push Button
Every 3 MonthsFix. Push Button
Every 6 MonthsPort. Op. Time
Every 2 YearsFix. Op. Time
Every 2 YearsResidential areas
Hotels, Motels, Boarding Houses, Accommodation, Residential Institutions
Residential & accommodation
Test & Tag
Every 2 YearsPort. Push Button
Every 6 MonthsFix. Push Button
Every 6 MonthsPort. Op. Time
Every 2 YearsFix. Op. Time
Every 2 YearsEquipment used for Commercial Cleaning
Cleaning contractors
Test & Tag
Every 6 MonthsPort. Push Button
Daily / Before Every UseFix. Push Button
N/APort. Op. Time
Every 6 MonthsFix. Op. Time
N/AHire Equipment
Equipment supplied on hire
Inspection
Prior to HireTest & Tag
Every 3 MonthsPush Button
Including push-button test by hirer
Port. Op. Time
Every 3 MonthsFix. Op. Time
Every 12 MonthsRepaired, Serviced & Second-hand Equipment
After repair or service which could affect electrical safety, or before reintroduction into service, refer to AS/NZS 5762.
Important Note
Inspection frequencies depend on equipment type, condition and working environment. Hostile environments require more frequent inspection and testing.
Always refer to AS/NZS 3760 or contact our team if you are unsure which interval applies to your workplace.
Our Process
How Three Phase Testing works
Our streamlined process ensures every three phase testing engagement is efficient, thorough, and fully documented.
Equipment Identification
Our technician identifies all three-phase equipment on site and builds an asset register.
Visual Inspection
Each item is inspected for cable damage, connector wear, and housing condition.
Insulation Testing
Calibrated 500V/1000V insulation resistance tests between all conductors and earth.
Running Current Test
Operating current measured across all three phases to detect overloading or imbalance.
Tagging & Reporting
Results recorded, tags applied, and full compliance report delivered within 24 hours.
Inspection Checklist
What we inspect
Every Three Phase Testing inspection follows a rigorous checklist to ensure nothing is missed.
Insulation Resistance
500V/1000V testing between all conductors and earth to verify insulation integrity.
Earth Continuity
Verification of protective earth continuity across all three phases and equipment chassis.
Phase Balance
Measurement of current draw across all three phases to identify imbalances.
Running Current
Measurement of actual operating current against rated capacity.
Visual Inspection
Thorough examination of plugs, connectors, cables, and equipment housings.
Tag Application
Durable test tags with QR codes applied to each tested item.
What You Receive
After your inspection, you receive
These digital tools and reports are included as part of your inspection — not sold separately.
Compliance Report
Full report with insulation resistance, phase balance, and running current data.
QR Asset Labels
Each tested item receives a QR code linking to its test history.
Compliance Certificate
Formal certificate confirming all three-phase equipment meets requirements.
Online Portal Access
24/7 access to equipment register and compliance dashboard.
Benefits
Why choose our Three Phase Testing?
Our three phase testingservice delivers measurable results for Perth businesses. Here's what sets us apart.
Specialist Equipment
We use calibrated three-phase testers capable of testing at 500V and 1000V insulation resistance for industrial equipment.
Minimal Downtime
Our technicians work around your production schedule, including after-hours and weekend testing to minimise operational impact.
Full Compliance
All testing meets AS/NZS 3760 requirements for three-phase portable equipment and cord assemblies.
Detailed Reporting
Complete test results including insulation resistance, earth continuity, phase balance, and running current documented in your compliance report.
Industries
Industries we serve
Our three phase testing service is built for businesses across these industries.
Service Area
Where we provide this service
Our Three Phase Testing service is delivered onsite across the Perth metropolitan area and surrounding regions.
Perth Metropolitan
Peel Region
Regional WA
- Selected regional locations available by arrangement
- Enquire for Availability
Three Phase Testing FAQs
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