We conduct testing and inspection of all electrical systems, installations and all equipment that ensure safe distribution of electric power from their source to all points required to power all equipment within a facility. The scope of work includes assessing the condition of electrical wiring, circuits, accessories and connections. This will be followed by issuance of an EICR which certifies the condition of the entire electric system in the facility.
Cornerstone will deploy engineers at the client’s facility based on a solution/approach that best suits their commercial operation. Following on from the isolation of each circuit for a short period of time, various tests will be conducted on each distribution board.
A visual inspection is conducted to look for ruptures, wear and tear, overheating, mislaid fragments, wobbly components, switchgear accessibility with no obstruction and to confirm if enclosure accesses are secure. It also covers inspection of equipment which haven’t been used or if left off or on standby for long periods of time.
Continuity test is used to confirm and verify the current flow in electric circuits between two paths. It helps to identify breaks or problems in the course of current in an electrical circuit. A small voltage is provided between paths to conduct this test.
Polarity tests verify that current conductors are connected in the right order. We carry this out by testing relevant points across the electric circuit.
Earth loop impedance testing is done to attest that sufficient current will flow into a fuse or current breaker in the case of an electrical fault.
Residual current devices (RCD) monitor the flow of electricity and cuts its flow in the circuit if an imbalance is detected. RCD trip testing or safety switch testing is done to check the integrity of the residual current devices.
The insulation resistance testing determines the quality of the insulation and its effectiveness in resisting the flow of electrical current.
Impending insulation failures can be detected before they occur if insulation resistance test is conducted at consistent intervals thereby preventing accidents and expensive repairs.
The resistance of electrical connection such as joints and connectors can be measured by contact resistance test. The resistance of terminations, conductors, cables and bus bar sections can also be tested. Ductor testing is used to verify that electrical connections are made properly and it has been designed to detect problems such as:
Cornerstone follow regulation 610.1 of BS 7671:2008 IEE Wiring Regulations Seventeenth Edition, which requires that every installation shall, during erection and on completion before being put into service, be inspected and tested to verify that the requirements of the Regulations have been met.