Electrical safety testing: protective earthing and RCDs
Earthing and RCDs are protections employees never see - until they need them. We test them with instruments, document them and state clearly what must be fixed.
What the service includes
Protective earth measurement
Continuity and resistance of the protective conductor at sockets and equipment.
RCD testing
Measurement of trip current and trip time of residual current devices.
Installation checks
Condition of distribution boards, cables and connections; signage and safe access.
Lightning protection
Condition checks of the building’s lightning protection system.
Measurement protocol
Measured values for every point, with a compliance assessment.
Corrective actions
Defects listed by severity and re-testing after repair.
What we measure, and in which unit.
Every parameter is reported with the measured value, location, instrument and a comparison with the permitted limit for that workplace.
- ΩProtective earthing resistance
- msRCD disconnection time
- mARCD tripping current
- MΩInsulation resistance
How we work
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Preparation
Diagrams, boards, circuits and points to be tested.
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Visual check
Condition of the installation, signage and mechanical protection.
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Measurements
Earthing, continuity and RCD testing with instruments.
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Protocol
Values, assessment and defects found.
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Re-test
Verification after repairs by your electrician.
Who needs it
- Offices and commercial buildings
- Factories and workshops
- Construction sites (temporary installations)
- Schools, hospitals and institutions
- Warehouses and logistics buildings
- Facility managers
What you receive
- Measurement protocolValues for every socket, circuit and RCD.
- Inspection reportCondition of the installation and findings.
- Defect listWith priority and repair deadline.
- Next test dateFor the equipment register.
Frequently asked questions
How often should earthing and RCDs be tested?
Periodically and after any change to the installation. Frequency depends on the type of building, conditions of use and legal requirements.
Is the “TEST” button on the RCD enough?
The button only shows that the mechanism moves. It does not measure trip current or trip time - that requires a test instrument.
Does power need to be switched off?
Most measurements are made with the installation live. RCD testing causes a short circuit disconnection, so it is coordinated in advance.
Do you repair defects?
HSK tests and documents. Repairs are carried out by your authorised electrician; afterwards we re-test.
Let’s discuss your workplace safety requirements.
Tell us briefly about your organisation and workplace. We will propose the first step.
