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What is the portable appliance testing frequency?:
The IEE code of Practice recommend that a portable appliance testing (PAT) frequency depends on the type of equipment, location, and the environment in which the equipment is used.

Portable appliance testing frequency in regards to equipment type:
Hand held appliances are much more likely to be damaged than fixed appliances. Class I appliances (containing an earth) have a higher risk of danger because the safety of the appliance depends on the continuity of the protective conductor from the plug to the appliance.

Portable appliance testing frequency depending on users:
Users of the equipment should be trained in line with the company’s Health & Safety Policy. If employees are trained on being able to report faults when they occur or inspecting faulty looking equipment, this will reduce the portable appliance testing (PAT) frequency. Portable appliance testing (PAT) frequency will then depend on a Risk Assessment (focusing on dangerous risks which have the potential to cause harm). With a Risk Assessment the portable appliance testing frequency will be reduced. On the other hand, if appliances are more likely to be subject to damage then the portable appliance testing (PAT) frequency is increased.

Portable appliance testing frequency in regards to the environment of the appliance:
If an appliance is used where it is more likely to be damaged, for example, a construction site, the portable appliance testing (PAT) frequency should increase.

Portable appliance testing frequency and equipment construction:
Protection of a Class I appliance depends on the connection with earth of the electrical installation; if the cable is damaged then the connection with the earth may be lost.

Portable appliance testing frequency in regards to new equipment:
Many people assume that the portable appliance testing frequency for new equipment is very rare. New equipment may have, for example, a power supply lead with reversed polarity or has not had the metal case bonded internally to the earth conductor of the power supply lead. Therefore, it is suggested that new equipment is purchased from reliable sources and the appliance is visually inspected for signs of damage. Appliances which are brought onto the premises by a member of staff from home could be more dangerous because it is coming from an unreliable source.

About the Author:Kirandeep Jheita

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