Specific Equipment Types

What is a specific consideration for extension lead testing?

• AThe same checks as any appliance
• BExtension leads don't need testing
• CCheck all sockets, insulation of the main cable, and socket contact condition✓
• DOnly test the first socket

Answer: Extension leads need thorough testing of all sockets, the main cable condition, and contact cleanliness to ensure safe operation of all connected equipment.

What is an RCD (Residual Current Device)?

• AA fuse
• BA power adapter which steps the mains supply voltage down for the appliance
• CAn extension lead that is fitted with several sockets along the length of it
• DA device that cuts power if leakage current exceeds a set level✓

Answer: An RCD automatically disconnects power if it detects current flowing to earth (fault current), providing additional protection against electric shock.

How should an RCD extension lead be tested?

• AIt cannot be tested at all
• BIn exactly the same way as any other extension lead, with no extra tests at all
• CRCDs don't need special testing
• DInclude testing that the RCD trips at the correct fault current level✓

Answer: RCD extension leads require additional testing to verify the RCD trips within the correct time at the appropriate fault current level.

What is a 110V electrical system?

• AAn American standard only
• BStandard UK mains voltage
• CA lower voltage system often used on construction sites for safety✓
• DA high voltage industrial supply that is used for heavy machinery in factories

Answer: 110V (often with a centre-tapped transformer giving 55V between live and earth) is used on construction sites to reduce shock risk.

What testing adjustments are needed for 110V equipment?

• AA much higher insulation test voltage is always required than for 230V equipment
• BTesting may be skipped
• CSame tests as 230V equipment
• DTest voltage may be reduced, and touch current limits may be different✓

Answer: Lower voltage equipment may require adjusted test voltages and may have different acceptance limits due to lower shock risk.

What is an IEC connector?

• AA safety device
• BAn international connector used for equipment power input✓
• CThe UK standard 13 A plug top that is fitted to appliance flexes
• DA type of connector that is not used on any electrical equipment at all

Answer: IEC connectors (like IEC 60320 C13/C14) are international standard connectors used on many items like computers and printers.

What is a specific concern with testing IT equipment?

• ATreat it as routine
• BElectrostatic discharge could damage the equipment during testing✓
• CIT equipment cannot be tested at all and must always be excluded from PAT
• DIT equipment never fails

Answer: Some IT equipment is sensitive to electrostatic discharge. Precautions may be needed, and some specialised equipment may require manufacturer approval before testing.

What should be checked on three-phase equipment?

• AAll three phase connections and earth continuity between all phases and earth✓
• BOnly the single-phase input
• COnly the first phase
• DThree-phase equipment doesn't need PAT testing

Answer: Three-phase equipment requires testing of all three phase connections and earth paths to ensure complete safety.

What is a specific issue with testing metal-cased equipment?

• AA metal case cannot be tested at all because it conducts the test current
• BMetal casings are always unsafe and should be replaced with plastic
• CThe metal case must be properly earthed for Class I equipment✓
• DIt raises the same issues as a plastic-cased item

Answer: Metal cases must be conductive and properly connected to earth for Class I equipment to function safely if insulation fails.

What is a 'plug adapter' or 'travel adapter' concern for PAT?

• AOnly test them once
• BThey should be checked for proper earthing and insulation condition✓
• CThey do not need any testing at all, since they contain no live components inside
• DThey're always safe

Answer: Plug adapters must be properly insulated and provide earth continuity if they're being used with Class I equipment.

What is a concern when testing double adapters or 'Y-shaped' connectors?

• AThey never need testing, as they carry no current themselves
• BThey are always unsafe and should never be used in a workplace
• CAll connections must be secure and properly insulated✓
• DThey can be treated as ordinary plugs

Answer: Double adapters create multiple connections that must be mechanically secure, properly insulated, and capable of carrying the combined current safely.

What is a 'dual voltage' appliance?

• AAn appliance designed to work on both 110V and 230V✓
• BAn appliance that is fitted with two separate mains plugs
• CThis is not a real category that is used in appliance testing
• DAn appliance that will only work on a 110V construction site supply

Answer: Dual voltage appliances (like some travel hair dryers) can operate safely on both 110V and 230V. Testing should confirm proper operation at both voltages if applicable.

What is specific about testing equipment with a 'sealed power unit'?

• AThey don't need testing
• BSealed units cannot be opened for internal inspection, so visual inspection is particularly important✓
• CAll sealed units fail
• DSuch units are no different from any other appliance

Answer: Equipment with sealed units (like laptop power supplies) cannot be opened for internal inspection, making thorough visual inspection and electrical testing critical.

What should be checked when testing power strips with surge protection?

• AAll outlets, surge protector function, and thermal overload protection✓
• BThe surge protection component does not need to be checked at all during the test
• COnly the plug
• DJust one outlet

Answer: Power strips with surge protection should be tested for all outlets and thermal overload protection function to ensure complete safety.

What is a concern with testing cordless equipment batteries?

• AIt is straightforward
• BBattery charging systems must be checked for proper insulation and earth continuity✓
• CCordless equipment doesn't need PAT testing
• DBatteries are always safe

Answer: Cordless equipment batteries and charging systems must be tested for electrical safety, not just the cordless device itself.