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CA452001EN - March 2015


Building Regulations

When specifying luminaires, legislation, as defined by the Building

Regulations, must be considered to ensure that the installation

meets with current requirements. The two most relevant pieces

of legislation contained within the Building Regulations are:

• Approved Document L - Conservation of fuel and power, which

includes limits on the energy efficiency of lighting in domestic

and non-domestic buildings.

• Approved Document B - Fire Safety, which includes the

requirements for emergency lighting and provisions for the

use of thermoplastic materials, such as luminaire diffusers.

Included below is a brief guide to each of these documents.

The latest information and requirements can be obtained by

contacting our Technical Support and Application department.

A list of recommended websites is also included below.

Approved Document L

Part L requires that energy efficient lighting be used in both

domestic (Part L1) and non-domestic (Part L2) buildings. The

regulations currently apply to all new buildings and refurbishments

of over 100m


floor area. The document provides design

information in non-domestic buildings.

The 2014 version now provides two ways to provide the energy

information during the design stage.

Option 1 is based on the installed load and uses the metric of

luminaire lumens per circuit Watts for office, industrial and storage

areas. Lamp lumens per circuit Watts are used for all other areas.

There is a small allowance for display lighting where relevant.

Option 2 is a simplified version of EN15193 known as LENI

(Lighting Energy Numeric Indicator). This is based on an energy

consumption model with actual usage targets for a selection of

areas and operating hours in Kwh/m


per annum.

The requirements can be met by selecting an efficient lamp,

control gear and luminaire performance combination, along with

lighting controls that make maximum use of daylight and avoid

unnecessary lighting during times when spaces are unoccupied.

Solutions include using high frequency dimmable control

gear linked to photocells to provide constant illumination and

daylight linking. Intelligent luminaires, such as Intellect, provide

a straightforward solution to providing lighting control with user

selectable functionality.

It is strongly recommended that reference be made to the current

edition of Approved Document L, to ensure compliance with the

latest requirements. Full details of Part L can be found on

, or alternatively, a direct web address

would be

Approved Document B

Part B includes the fire safety requirements for emergency lighting

and the use of thermoplastic materials. The impact on emergency

lighting of Approved Document B2 defines the provisions that

apply to the use of luminaire diffusers, which form part of the

ceiling. It should be noted that surface mounted and suspended

luminaires are not currently covered by the regulations.

Luminaire with diffusers must not be used in fire protecting or fire

resisting ceilings, unless satisfactorily tested as part of the ceiling


Approved Document B (cont’d)

The following information is provided on the limitation of use

of thermoplastic (TP) materials in other ceiling types (except

protected stairways):

• Diffusers classified as TPa construction have no restriction on

extent of use

• Diffusers classified as TPb construction have limitations on size,

total area coverage and spacing between diffusers

In areas with general ceiling types, except protected stairways,

the requirements can be met most simply by specifying TPa

classification diffusers when using recessed luminaires. TPb

materials can be used, but will require careful reference to Part B

and calculation to ensure the regulations are complied with in full.

All recessed luminaires with diffusers in this catalogue have TPa

classification materials as standard or as an option.

It is strongly recommended that reference be made to the current

edition of Approved Document B, to ensure compliance with the

latest requirements. Full details of Part B can be found on

Additional Considerations

There are many schemes both nationally and locally in operation,

offering advice and financial support to end users, such as the

Carbon Trust Implementation Scheme. This can provide full

surveys, introductions to approved designers and installers and

facilitate finance through the scheme.

Enhanced Capital Allowances (ECA)

This allows companies to claim 100% first year capital allowances

on investments that meet the ECA product criteria.

Product groups eligible for ECA’s are published in the Energy

Technology List at

Currently Lighting products are listed in three categories, however

it is planned to incorporate LED in to the HELU:

• HELU High Efficient Lighting Units

• Lighting Controls

• White LED

Luminaires must meet minimum efficiency standards calculated as

luminaire lumens per circuit watts, as these minimum values are

subject to variation the latest information should be checked on

the ECA Scheme website


Luminaire efficiency ratings for Eaton luminaires are available by

contacting our Technical Support and Application Department.


that due to the wide variation in luminaires these are not

individually listed as products but are self-certified against the

energy criteria calculation.

Useful Website Addresses

- Building Regulations

- Enhanced Capital Allowances

- Promotion of low carbon

technologies/energy efficiency

- Climate Change Levy

- Department of Energy and Climate


- Department of Business Innovation

and Skills