Specifications

NAIROBI OPERATIONAL HUB
D. The above temperatures do not take into consideration heat generated from the
equipment itself or from any other equipment installed in the vicinity.
E. The capacity and rating of all electrical equipment and materials given are
Local rating, i.e. rating when equipment are operating under Local Climatic
Conditions. Any derating factors applied should be clearly indicated.
F. Where specific sizes are indicated e.g. cable sizes, due allowances have been
made in the design for the climatic conditions of project and de-rating has
been applied.
1.05 ELECTRICITY SUPPLY
A. All electrical equipment accessories and fittings shall be designed and
manufactured to operate continuously in the electricity supply system having
the following characteristics: -
Voltage 415 Volts ± 6% 3Phase 4-Wire
Frequency 50 Hz ± 4%
Neutral Solidly Earthed
Fault Level 31 MVA at 415 volts
Fault Duration 0.5 Seconds
1.06 STANDARDS
A. All works contained herein shall be subject in every respect to the approval of
the Engineer.
The design manufacture installation and testing of all materials and equipment
shall comply with the latest Local Authorities Specifications. Where no
particular item is not specified by Local Authorities Specifications, relevant
recommendation of the International Electrotechnical Commission (I.E.C.)
and if this is not available then with the latest relevant British Standard
Specification (B.S.S.) or other approved National Standards. Specifically the
following standards/regulations/codes shall be acceptable:
- IES/CIBSE Illumination codes
- CIE International Commission on Illumination
- Relevant British Standard Codes for Practice (BSCP)
- International Commission for Conformity Certification of Electrical
Equipment (CEE)
- Specifications for Installation of Telephones, issued by the Ministry Of
Telecommunication.
- The latest relevant recommendations of the committee ‘Consultant
International Telephone and Telegraph (CCITT)
- Civil Defense Fire Department
- British Fire Officer’s Committee (FOC) Rules (Latest Edition)