Page 3 - Test Talk: FAQs

Question:

Why does my PAT tester keep failing long extension leads?

Answer:

The IET Code of Practice states that a cord set (extension lead) should have an Earth Continuity of <0.1Ω+R.

Question:

What is Microwave Leakage and do I need to test for it?

Answer:

Microwave leakage is exposure to high levels of microwave radiation. A microwave that is leaking radiation can lead to major health problems such as a weakened immune system, burns and cancer.

Question:

Do I need to PAT test new electrical equipment?

Answer:

New equipment should be supplied in a safe condition and not require a formal portable appliance inspection or test. However, a simple visual check is recommended to verify the item is not damaged.

Question:

How often should I carry out PAT Testing?

Answer:

The underlying principle for frequency of testing is that the duty holder (i.e. the person with the equipment "within his control") with the advice of the competent test person when necessary must assess the need for testing the equipment against the following factors:

Question:

Is PAT testing a legal requirement?

Answer:

The Electricity at Work Regulations 1989 require that any electrical equipment that has the potential to cause injury is maintained in a safe condition. However, the Regulations do not specify what needs to be done, by whom or how frequently.

Question:

What is the difference between a PSC and a PFC test?

Question:

Why does my continuity and insulation resistance meter sometimes display a negative resistance value after I've 'nulled' my test lead resistance as recommended?

Question:

Do I need to have my test equipment calibrated annually if I’m keeping my own measurement records?

Question:

Whilst looking at different specifications of test equipment, I’ve come across the phrase ‘ramp test’. I know this has something to do with testing RCD’s, but what is a ramp test?

Question:

Our company use a fleet of Megger MFT1720 multifunction testers to complete inspection, testing and certification of both new and existing electrical installations. However, when we carry out a loop test at the same socket outlet, each tester displays a varied reading which may differ by 0.20 Ohms. Why is this when the make and model of each tester in use are identical?