Handbook on the Wiring Regulations The IEE Wiring by Electrical Contractors' Association (ECA)

By Electrical Contractors' Association (ECA)

This good confirmed instruction manual, written and backed via Contractors' organization and choose (formerly Contractors' organization of Scotland), offers an in depth, authoritative advisor to the Wiring rules, BS 7671: specifications for electric Installations.

As the laws usually are not drafted through subject, the instruction manual might be quite worthwhile in guiding designers, installers, inspectors and testers around the numerous requisites. It provides useful tips on the right way to method new installations, extensions to latest installations, and the extra vast checking out and inspection that are required.

The guide has been revised to take account of amendments brought via BS 7671:2001 powerful from 1 January 2002. the main major alterations are:

· bankruptcy thirteen rewritten to incorporate 3 sections on defense for protection, layout and choice of electric gear

· a brand new bankruptcy forty four on overvoltage security

· a brand new bankruptcy forty eight on excessive hearth hazard occasions

· revisions to the necessities on rooms containing a bathtub or bathe

· new earthing requisites for the set up of kit with excessive protecting conductor retailers

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Extra resources for Handbook on the Wiring Regulations The IEE Wiring Regulations

Sample text

The section deals with protection of electrical installations against overvoltages caused by atmospheric origin transmitted by the supply system and against overvoltages generated by switching equipment within the installation. The Chapter has two tables -Table 44A required minimum impulse withstand voltage and Table 44B gives examples of various impulse category equipment. The Chapter does not consider the effects of direct lightning strikes on low voltage lines on the supply network or electrical installations.

Generating sets Rotating machines Accessories I Current-using equipment I I 555 Transformers Section 551 551 Generating sets -l 551 - 03 Extra-low voltage systems supplied from more than one source I I Protection against indirect contact 1 551 - 07 Protection against overcurrent Additional requirements (standby systems) Additional requirements (para1lel systems) Section 553 553 Accessories 553 - 01 Plugs and socketoutlets Page B5/10 553 - 02 Cable couplers 553 - 03 Lampholders 553 - 04 Lighting points Section 554 L 554 Current-using equipment - 554 01 554 - 02 Luminaires High voltage discharge lighting installations - I I immersed and uninsulated heating elements and cables - 554 03 554 04 Electrode water heaters and boilers Heaters for liquids or other substances, having immersed heating elements Electric surface heating systems Chapter 56 -Supplies for Safety Services Within most non-domestic buildings there are circuits that must continue to operate in an emergency such as fire detection and alarm, smoke ventilation fans, sprinkler pumps, etc.

Page B6/2 Section 603 The conditions in a sauna steam room pose similar problems to the two previous situations with the added hazard of periods of high humidity which can cause deterioration of the installation with consequent increase in risks. 603 Hot air saunas - - - 603 01 & 02 603 03 to 05 603 06 to 09 Scope applies where a sauna heater is installed and to temperature zones around it Protection against electric shock by direct and indirect contact Common rules for wiring systems, switchgear and other fixed equipment Section 604 Because the installations on a construction site are temporary they may be inherently less well protected and more exposed to damage during building operations.

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