Electrical Installation LV2 203 Mock Exam

Identify the non-statutory act/regulation from this list

• EaW

• EPA

• BS7671

• HASAWA

Answer explanation

Statutory

In Great Britain, the ‘law’ is the generic term for any legal rule or regulation enforced by government to regulate behaviour or activities in society and is made up of either ‘primary’ or ‘secondary’ legislation.

Non Statutory

In the world of electrical installations it has become common practice to use this term to describe the most reliable and informative industry reference material, such as Codes of Practice (COP), British Standards (such as BS 7671)

identify the maximum spacing for the supports for a 63mm diameter PVC conduit when installed in a horizontal position.

• 1.75 metres

• 1.25 metres

• 2 metres

• 2.25 metres

Answer explanation

Appendix D - Method of support for cables, conductors and wiring systems

Table D3 - Greater than 40 mm and horizontal position

identify the type of emergency light fitting that only illuminates during a mains power failure

•  sustained

• contained

• maintained

• non maintained

Answer explanation

Maintained is on at all times. Maintained emergency lights are mains powered and used as part of the normal room lighting system. But, in an emergency situation when mains power fails, it will continue to stay lit for a specific duration powered by a back-up battery

Non Maintained usually only comes on for a specific duration when the power supply to normal artificial lighting fails. Non-maintained emergency lights are normally suitable for workplaces which are usually lit when occupied. Non-maintained light fittings are powered by a battery that is charged from a constant trickle of mains power.

identify the rated short-circuit capacity of a BS88-3 (type I) device as detailed in the On Site guide

• 33kA

• 16.5kA

• 31.5kA

• 16kA

Answer explanation

OSG - Section 7

Table 7.2.7 (i) Rated short-circuit capacities

Identify the cable system that is 'hygroscopic'

• CAT6

• MIMS

• FP200

• PILC

Answer explanation

The meaning of HYGROSCOPIC is readily taking up and retaining moisture

Identify the type of SPD to be used at a distribution board

• type 3

• Type 2

• type 1

• type 4

Answer explanation

OSG

SPD - Surge protection devices

3.7.3 - Types of SPD protection

What is the volt drop in mv for an 4mm2 thermoplastic (pvc) insulated and sheathed flat cable with protective conductor

• 5mv

• 11 mv

• 44mv

• 10mv

Identify the factor for a 2.5mmsq stranded conductor to be installed in a short, straight length of conduit

• 45

• 43

• 50

• 40

Answer explanation

OSG

Appendix - E Cable capacities of conduit and trunking

Table E1

Identify the PEI equipment than can be considered as both a load and a generator

• turbine

• solar

• battery

• motor

Answer explanation

OSG

Section 12 - Prosumer's electrical installations

Identify the factor for a 6 mmsq stranded conductor to be installed in a 5-metre straight length of conduit

• 65

• 34

• 55

• 58

Answer explanation

OSG

Appendix E - Cable capacities of conduit and trunking.

Table E3