Code of Practice for Energy Efficiency of Electrical Installations


The Code of Practice for Energy Efficiency of Electrical Installations aims to set out the minimum requirements on energy efficiency of electrical installations in buildings. It forms a part of a set of comprehensive Building Energy Codes that addresses energy efficiency requirements on building services installations. Designers are encouraged to adopt a proactive approach to exceed the minimum requirements of this code.

 


Scope:



1- The Code shall apply to all fixed electrical installations, other than those used as emergency systems, for all buildings except those specified in Clause 1.2, 1.3 and 1.4.

2- The following types of buildings are not covered in the Code: 

(a) buildings with a total installed capacity of 100A or less, single or three-phase at nominal low voltage; and
(b) buildings used solely for public utility services such as power stations, electrical sub-stations, water supply pump houses, etc.

3- Buildings designed for special industrial process may be exempted partly or wholly from the Code subject to approval of the Authority

4- Equipment owned by the public utility companies (e.g. HV/LV switchgear, transformers, cables, extract fans, etc.) and installed in consumers' substations will not be covered by the Code

5- In case where the compliance of this Code is in conflict with the safety requirements of the relevant Ordinance, Supply Rules, or Regulations, the requirements of this Code shall be superseded. This Code shall not be used to circumvent any safety, health or environmental requirements.


Contents:



1- SCOPE 



2- DEFINITIONS 



3- GENERAL APPROACH 



4- ENERGY EFFICIENCY REQUIREMENTS FOR POWER DISTRIBUTION IN BUILDINGS
4.1 High Voltage Distribution
4.2 Minimum Transformer Efficiency
4.3 Locations of Distribution Transformers and Main Switchboard
4.4 Main Circuits
4.5 Feeder Circuits
4.6 Sub-main Circuits
4.7 Final Circuits

5- REQUIREMENTS FOR EFFICIENT UTILISATION OF POWER
5.1 Lamps and Lurninaires
5.2 Air Conditioning Installations
5.3 Vertical Transportation
5.4 Motors and Drives
5.5 Power Factor Improvement
5.6 Other Good Practice

6- ENERGY EFFICIENCY REQUIREMENTS FOR POWER QUALITY
6.1 Maximum Total Harmonic Distortion (THD) of Current on LV Circuits
6.2 Balancing of Single-phase Loads

7- REQUIREMENTS FOR METERING AND MONITORING FACILITIES
7.1 Main Circuits
7.2 Sub-main and Feeder Circuits

8- SUBMISSION OF INFORMATION 



SCHEDULE OF FORMS:
FORM EL-l: Electrical Installations Summary

FORM EL-2: Electrical Power Distribution Worksheet

FORM EL-3: Electrical Power Utilization Worksheet

FORM EL-4: Electrical Power Quality Worksheet

FORM EL-5: Electrical Metering & Monitoring Worksheet

APPENDICES:
Appendix A: Explanatory Notes and Sample Calculations

Appendix B: Case Study




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