For an industrial facility, a failed motor, overheated connection or damaged cable rarely causes only a technical inconvenience. It can stop production, delay deliveries, increase energy consumption and expose people or equipment to avoidable risk. Preventive electrical maintenance replaces the cycle of “run until failure, then repair” with a more disciplined approach: inspect, measure, compare and intervene before a fault becomes an outage.
The value of that approach is especially clear in factories, commercial buildings, utilities, hospitals and infrastructure across Ghana and West Africa, where reliable equipment is essential and replacement components may not always be immediately available.
Start with a measurement history
A single reading tells you what is happening now. A series of readings shows what is changing. Effective maintenance teams record results for critical assets at commissioning and at planned intervals. Those records create a baseline for switchboards, motors, generators, cables and other equipment. When insulation resistance begins to fall, current becomes unbalanced or temperature rises at a connection, the trend can identify deterioration long before an operator notices a visible problem.
The aim is not to collect measurements for their own sake. It is to turn reliable data into better maintenance decisions.
Five checks that reveal common electrical problems
1. Insulation resistance
Insulation degrades through heat, moisture, contamination, vibration and age. Periodic insulation testing can help maintenance teams identify deterioration before it results in leakage current, short circuits, nuisance tripping or equipment failure. Instruments such as the Chauvin Arnoux C.A 6526 insulation and continuity tester are designed for planned testing and comparison of measurement histories.
2. Protective continuity and earthing
Protective conductors and earthing arrangements form an essential path for fault current. Testing continuity and earth resistance helps confirm that protective measures remain effective after installation changes, corrosion or mechanical damage.
3. Load current and imbalance
Clamp meters allow current to be checked without disconnecting the conductor. Comparing phases can reveal imbalance, overloading or unexpected operating conditions. For more demanding low-voltage work, a power and harmonics clamp meter such as the Chauvin Arnoux F407 adds power, harmonics, inrush and recording functions.
4. Power quality
Voltage disturbances, harmonics, transients, flicker and poor power factor can affect sensitive equipment and raise operating costs. A CA8336 power-quality analyser can capture network parameters, alarms, transients and waveforms so engineers can diagnose events using evidence rather than guesswork.
5. Temperature
Abnormal heating often indicates loose connections, overloads, phase imbalance or failing components. Thermal inspection complements electrical measurements by helping teams find developing faults without dismantling operating equipment. Any investigation around live equipment must be performed by competent personnel using appropriate procedures and personal protective equipment.
Build a practical maintenance routine
A useful programme begins by ranking assets according to safety, production and replacement risk. Establish baseline readings, define inspection intervals, use consistent test methods and record the instrument, date, operating condition and result. When a value changes, investigate the cause instead of relying only on a pass/fail decision.
The right instrument also matters. The measurement category, voltage and current range, environment, required records and applicable standards should guide selection. A general-purpose multimeter may be ideal for one task, while another requires an insulation tester, earth tester, logger or power-quality analyser.
Chauvin Arnoux Africa supplies professional electrical test and measurement instruments with local product guidance through Nocheski Ltd in Tema, Ghana. If you are planning a preventive maintenance programme, request technical guidance and tell us what you need to measure, the operating range and the working environment.
Safety note: Electrical measurements should be carried out only by suitably trained and authorised personnel. Always follow the applicable regulations, site procedures and the instrument manufacturer’s instructions.