Part P

NBS Building Regulations - The requirement


The requirement

Requirements;Cavity insulation;Examples of application;Changes to the buildings regulations 2000;Interaction with other parts of the building regulations


This Approved Document took effect on 6 April 2006. It deals with the requirements of Part P of Schedule 1 to the Building Regulations 2010  [ CIS link: Building Regulations 2010.  Statutory Instruments SI 2010/2214 ] .





Limits on application




Design and installation

P1. Reasonable provision shall be made in the design and installation of electrical installations in order to protect persons operating, maintaining or altering the installation from fire or injury.

The requirements of this part apply only to electrical installations that are intended to operate at low or extra-low voltage and are:

(a)in or attached to a dwelling;

(b)in the common parts of a building serving one or more dwellings, but excluding power supplies to lifts;

(c)in a building that receives its electricity from a source located within or shared with a dwelling; or

(d)in a garden or in or on land associated with a building where the electricity is from a source located within or shared with a dwelling.


Examples of application of Part P

Part P applies to electrical installations  "Electrical installation is defined in BS 76711 as 'an assembly of associated electrical equipment supplied from a common origin to fulfil a specific purpose and having certain co-ordinated characteristics.' For the purposes of Building Regulations an electrical installation means fixed electrical cables or fixed electrical equipment located on the consumer's side of the electricity supply meter. " in buildings or parts of buildings comprising:

·dwelling houses and flats;

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