16th Edition (reference only) – NOW superseded by the 17th Edition IEE Regulations.

chapter 5

chapter 6

Installation control and protection
  3.1 - Introduction 3.5 - High temperature protection
  3.2 - Switching 3.6 - Overload currents
  3.3 - Isolation 3.7 - Protection from faults
3.4 - Electric shock protection

3.8 - Short circuit and overload
------- protection

3.4.5 -  Direct contact protection

The methods of preventing direct contact are mainly concerned with making sure that people cannot touch live conductors. These methods include:

1. - the insulation of live parts - this is the standard method. The insulated conductors should be further protected by sheathing, conduit, etc.

2. - the provision of barriers, obstacles or enclosures to prevent touching (IP2X). Where surfaces are horizontal and accessible, IP4X protection (solid objects wider than 1 mm are excluded - see {Table 2.4}), applies

3. - placing out of reach or the provision of obstacles to prevent people from reaching live parts

4. - the provision of residual current devices (RCDs) provides supplementary protection {5.9} but only when contact is from a live part to an earthed part.


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Extracted from The Electricians Guide Fifth Edition
by John Whitfield

Published by EPA Press Click Here to order your Copy.

Click here for list of abbreviations