16th Edition (reference only) – NOW superseded by the 17th Edition IEE Regulations.

chapter 5

chapter 6

Installation requirements and characteristics
  2.1 - Introduction 2.5 - Low voltage generating sets
  2.2 - Safety requirements [Part 1] 2.6 - Standards
  2.3 - Definitions [Part 2] 2.7 - Undervoltage
2.4 - Assessment of general
-------characteristics [Part 3]

2.4.2 -  Purposes, supplies and structure

[Chapter 31] includes regulations which effectively provide a check list for the designer to ensure that all the relevant factors have been taken into account.

An abbreviated check list would include the items shown in {Table 2.2}. Where equipment's or systems have different types of supply, such as voltage or frequency, they must be separated so that one does not influence the other.

 Table 2.2 - Initial check list for the designer

The maximum demand
The number and type of live conductors
The type of earthing arrangement
The nature of supply, including:
i) nominal voltage(s)
ii) nature of current (a.c. or d.c.) and frequency
iii) prospective short circuit current at the supply intake
iv) earth fault loop impedance of the supply to the intake position
v) suitability of the installation for it’s required purposes, including maximum demand
vi) type and rating of the main protective device (supply main fuse)
e) the supplies for safety services and standby purposes
f) the arrangement of installation circuits.

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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