R-1 — لوائح التركيبات الكهربائية
3 المتطلبات العامة للتركيبات الكهربائية
الصفحة 14 في الوثيقة الأصلية
عرض PDFSECTION 3
GENERAL REQUIREMENTS FOR ELECTRICAL INSTALLATIONS
301 All electrical equipment, accessories and fittings employed in electrical installations shall be fully suitable
for use in the extreme climatic conditions of Kuwait having the following salient features:-
Maximum sun radiation temperature in summer. : 84 oC
Maximum ambient temperature in summer. : 55 oC
Average maximum ambient temperature in summer. : 45 oC
Minimum ambient temperature in Winter. : -6 oC
Periods of high humidity are common and a relative humidity of 100% at 30°C has been recorded. Violent sand
storms are common and even on comparatively still days fine dust is carried in suspension in the air.
302 In buildings of substantial construction, all electrical equipment and cables shall be rated for
continuous operation at the maximum and the minimum ambient temperatures encountered in Kuwait.
303 All electrical equipment, accessories and fittings shall be designed and manufactured to operate
continuously in the electricity supply system having the following characteristics:-
Voltage
Frequency
Neutral
Fault level
Fault duration
415 volts + 6 percent, 3 phase, 4 wire.
50 Hz + 4 percent.
Solidly earthed, TT System
31 MVA at 415 volts.
0.5 seconds.
NOTE - Where it can be established that the fault level is lower than 31 MVA, electrical
switchgear and accessories with a lower interrupting capacity may be employed subject
to the prior approval of the Ministry of Electricity and Water.
304 All electrical wiring shall be so installed that when completed the system will be free from short cir cuits
and earth faults.
305 Devices intended to break current shall have a breaking capacity sufficient for the voltage employed and for
the current that must be interrupted.
306 All electrical equipment shall be firmly secured to the surface on which it is mounted. Wooden plugs driven
into holes in masonry, concrete, plaster or similar materials shall not be used.
307 All electrical equipment, accessories and fittings exposed to weather, corrosive atmosphere or other adverse
conditions shall be so constructed or protected as may be necessary to prevent danger arising from such exposure.
308 Where electrical equipment, accessories, fittings and cables are likely to be exposed to flammable
surroundings or an explosive atmosphere, it shall be protected by a flame -proof enclosure or be otherwise so
designed and constructed as to prevent danger. Cables with improved fire-resisting characteristics shall be used for
such installations.
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309 All electrical equipment, accessories, fittings and cables shall be installed in a neat and workmanlike
manner so as to facilitate its easy operation, inspection and maintenance .
310 All materials used in electrical installation shall be of good quality and shall comply as a minimum with the
latest relevant recommendations of the International Electro-Technical Commission (l.E.C.) and If this is not
available to the latest relevant British Standard Specifications (B.S.S.). Materials of other national standards may
also be employed provided they are comparable with IEC/BSS.
311 No addition, temporary or permanent, shall be made to the authorized load of an existing installation,
unless it has been ascertained that the current rating and the condition of any existing conductors and equipment
which will have to carry the additional load are adequate for the increased loading and that the earthing
arrangements are also adequate.
NOTES - l. Any additions to existing installations shall only be executed after approval of drawings by
the Ministry of Electricity and Water.
2. The Ministry of Electricity and Water reserves the full right to disconnect the electrical
supply to any consumer who has carried out unauthorized addition or extension to the
originally approved electrical installation.
313 All electrical installation works, new and/or a additions shall only be carried out by licensed electrical
supervisors or approved electrical contractors, as authorized by the Ministry of Electricity and Water from time to
time.
314 All electrical equipment including fractional H.P. motors, window A/C units, fluorescent light fittings, etc.,
shall be so selected that the over-all power factor is not less than the following:
Fluorescent and discharge light fittings
Window type A/C units
Refrigerators
Other single phase motors
3-phase motors (415 V, 50 Hz, 1450 rpm)
Motors 15 HP - 50 HP
Motors 50 HP - 100 HP
Motors 100 HP - 200 HP
Motors 200 HP - 400 HP
Motors Above 400 HP
P. P. F.
0.90
0.85
0.85
0.80
0.83
0.85
0.87
0.88
0.89
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GENERAL REQUIREMENTS FOR ELECTRICAL INSTALLATIONS
301 All electrical equipment, accessories and fittings employed in electrical installations shall be fully suitable
for use in the extreme climatic conditions of Kuwait having the following salient features:-
Maximum sun radiation temperature in summer. : 84 oC
Maximum ambient temperature in summer. : 55 oC
Average maximum ambient temperature in summer. : 45 oC
Minimum ambient temperature in Winter. : -6 oC
Periods of high humidity are common and a relative humidity of 100% at 30°C has been recorded. Violent sand
storms are common and even on comparatively still days fine dust is carried in suspension in the air.
302 In buildings of substantial construction, all electrical equipment and cables shall be rated for
continuous operation at the maximum and the minimum ambient temperatures encountered in Kuwait.
303 All electrical equipment, accessories and fittings shall be designed and manufactured to operate
continuously in the electricity supply system having the following characteristics:-
Voltage
Frequency
Neutral
Fault level
Fault duration
415 volts + 6 percent, 3 phase, 4 wire.
50 Hz + 4 percent.
Solidly earthed, TT System
31 MVA at 415 volts.
0.5 seconds.
NOTE - Where it can be established that the fault level is lower than 31 MVA, electrical
switchgear and accessories with a lower interrupting capacity may be employed subject
to the prior approval of the Ministry of Electricity and Water.
304 All electrical wiring shall be so installed that when completed the system will be free from short cir cuits
and earth faults.
305 Devices intended to break current shall have a breaking capacity sufficient for the voltage employed and for
the current that must be interrupted.
306 All electrical equipment shall be firmly secured to the surface on which it is mounted. Wooden plugs driven
into holes in masonry, concrete, plaster or similar materials shall not be used.
307 All electrical equipment, accessories and fittings exposed to weather, corrosive atmosphere or other adverse
conditions shall be so constructed or protected as may be necessary to prevent danger arising from such exposure.
308 Where electrical equipment, accessories, fittings and cables are likely to be exposed to flammable
surroundings or an explosive atmosphere, it shall be protected by a flame -proof enclosure or be otherwise so
designed and constructed as to prevent danger. Cables with improved fire-resisting characteristics shall be used for
such installations.
14
309 All electrical equipment, accessories, fittings and cables shall be installed in a neat and workmanlike
manner so as to facilitate its easy operation, inspection and maintenance .
310 All materials used in electrical installation shall be of good quality and shall comply as a minimum with the
latest relevant recommendations of the International Electro-Technical Commission (l.E.C.) and If this is not
available to the latest relevant British Standard Specifications (B.S.S.). Materials of other national standards may
also be employed provided they are comparable with IEC/BSS.
311 No addition, temporary or permanent, shall be made to the authorized load of an existing installation,
unless it has been ascertained that the current rating and the condition of any existing conductors and equipment
which will have to carry the additional load are adequate for the increased loading and that the earthing
arrangements are also adequate.
NOTES - l. Any additions to existing installations shall only be executed after approval of drawings by
the Ministry of Electricity and Water.
2. The Ministry of Electricity and Water reserves the full right to disconnect the electrical
supply to any consumer who has carried out unauthorized addition or extension to the
originally approved electrical installation.
313 All electrical installation works, new and/or a additions shall only be carried out by licensed electrical
supervisors or approved electrical contractors, as authorized by the Ministry of Electricity and Water from time to
time.
314 All electrical equipment including fractional H.P. motors, window A/C units, fluorescent light fittings, etc.,
shall be so selected that the over-all power factor is not less than the following:
Fluorescent and discharge light fittings
Window type A/C units
Refrigerators
Other single phase motors
3-phase motors (415 V, 50 Hz, 1450 rpm)
Motors 15 HP - 50 HP
Motors 50 HP - 100 HP
Motors 100 HP - 200 HP
Motors 200 HP - 400 HP
Motors Above 400 HP
P. P. F.
0.90
0.85
0.85
0.80
0.83
0.85
0.87
0.88
0.89
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