Unfortunately, insulator failure is a primary reason why electrical devices stop working.

To protect against electrical incidents

Testing & Inspection of Electrical Services

Even when using a surge protector, make sure the electrical load is not too much for the circuit.

Avoid overloading outlets with too many appliances. ...

Unplug appliances when not in use to save energy and minimise the risk of shock and fire.

Inspect electrical cords once a month to ensure they are not frayed, cracked or otherwise damaged.

Do not run electrical cords through high-traffic areas, under carpets or across doorways.

Consider having a licensed electrician install additional outlets where needed, rather than relying on extension cords and power strips.

Ensure all electrical equipment is certified by a nationally recognised laboratory and read all manufacturers’ instructions carefully.

A combination of electrical stress and the degradation of insulation are continually happening, as one of the significant causes of insulation failure is general wear and tear. As pinholes or cracks develop, moisture and foreign materials penetrate the insulation, providing a lower resistance path for leakage current.