Chapter A General rules of electrical installation design

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© Schneider Electric - all rights reserved C2 C - Connecion to the LV public distribution network The most-common LV supplies are within the range 120 V single phase to 240/415 V 3-phase 4-wires. Loads up to 250 kVA can be supplied at LV, but power-supply organizations generally propose a MV service at load levels for which their LV networks are marginally adequate. An international voltage standard for 3-phase 4-wire LV systems is recommended by the IEC 60038 to be 230/400 V Low-voltage utility distribution networks . Low-voltage consumers In Europe, the transition period on the voltage tolerance to “230V/400V + 10% / - 10%” has been extended for another 5 years up to the year 2008. Low-voltage consumers are, by definition, those consumers whose loads can be satisfactorily supplied from the low-voltage system in their locality. The voltage of the local LV network may be 120/208 V or 240/415 V, i.e. the lower or upper extremes of the most common 3-phase levels in general use, or at some intermediate level, as shown in Figure C . An international voltage standard for 3-phase 4-wire LV systems is recommended by the IEC 60038 to be 230/400 V. Loads up to 250 kVA can be supplied at LV, but power-supply organizations generally propose a MV service at load levels for which their LV networks are marginally adequate. Country Frequency & tolerance Domestic (V) Commercial (V) Industrial (V) (Hz & %) Afghanistan 50 380/220 (a) 380/220 (a) 380/220 (a) 220 (k) Algeria 50 ± 1.5 220/127 (e) 380/220 (a) 10,000 220 (k) 220/127 (a) 5,500 6,600 380/220 (a) Angola 50 380/220 (a) 380/220 (a) 380/220 (a) 220 (k) Antigua and Barbuda 60 240 (k) 400/230 (a) 400/230 (a) 120 (k) 120/208 (a) 120/208 (a) Argentina 50 ± 2 380/220 (a) 380/220 (a) 220 (k) 220 (k) Armenia 50 ± 5 380/220 (a) 380/220 (a) 380/220 (a) 220 (k) 220 (k) Australia 50 ± 0.1 415/240 (a) 415/240 (a) 22,000 240 (k) 440/250 (a) 11,000 440 (m) 6,600 415/240 440/250 Austria 50 ± 0.1 230 (k) 380/230 (a) (b) 5,000 230 (k) 380/220 (a) Azerbaijan 50 ± 0.1 208/120 (a) 208/120 (a) 240/120 (k) 240/120 (k) Bahrain 50 ± 0.1 415/240 (a) 415/240 (a) 11,000 240 (k) 240 (k) 415/240 (a) 240 (k) Bangladesh 50 ± 2 410/220 (a) 410/220 (a) 11,000 220 (k) 410/220 (a) Barbados 50 ± 6 230/115 (j) 230/115 (j) 230/400 (g) 115 (k) 200/115 (a) 230/155 (j) 220/115 (a) Belarus 50 380/220 (a) 380/220 (a) 380/220 (a) 220 (k) 220 (k) 220/127 (a) 127 (k) Belgium 50 ± 5 230 (k) 230 (k) 6,600 230 (a) 230 (a) 10,000 3N, 400 3N, 400 11,000 15,000 Bolivia 50 ± 0.5 230 (k) 400/230 (a) 400/230 (a) 230 (k) Botswana 50 ± 3 220 (k) 380/220 (a) 380/220 (a) Brazil 60 220 (k) 220/380 (a) 13,800 127 (k) 127/220 (a) 11,200 220/380 (a) 127/220 (a) Brunei 50 ± 2 230 230 11,000 68,000 Bulgaria 50 ± 0.1 220 220/240 1,000 690 380 Fig. C1 : Voltage of local LV network and their associated circuit diagrams (continued on next page) Schneider Electric - Electrical installation guide 2008
C - Connecion to the LV public distribution network Fig. C1 : Voltage of local LV network and their associated circuit diagrams (continued on next page) Low-voltage utility distribution networks Country Frequency & tolerance (Hz & %) Domestic (V) Commercial (V) Industrial (V) Cambodia 50 ± 1 220 (k) 220/300 220/380 Cameroon 50 ± 1 220/260 (k) 220/260 (k) 220/380 (a) Canada 60 ± 0.02 120/240 (j) 347/600 (a) 7,200/12,500 480 (f) 347/600 (a) 240 (f) 120/208 120/240 (j) 600 (f) 120/208 (a) 480 (f) 240 (f) Cape Verde 220 220 380/400 Chad 50 ± 1 220 (k) 220 (k) 380/220 (a) Chile 50 ± 1 220 (k) 380/220 (a) 380/220 (a) China 50 ± 0.5 220 (k) 380/220 (a) 380/220 (a) 220 (k) 220 (k) Colombia 60 ± 1 120/240 (g) 120/240 (g) 13,200 120 (k) 120 (k) 120/240 (g) Congo 50 220 (k) 240/120 (j) 120 (k) 380/220 (a) Croatia 50 400/230 (a) 400/230 (a) 400/230 (a) 230 (k) 230 (k) Cyprus 50 ± 0.1 240 (k) 415/240 11,000 415/240 Czech Republic 50 ± 1 230 500 400,000 230/400 220,000 110,000 35,000 22,000 10,000 6,000 3,000 Denmark 50 ± 1 400/230 (a) 400/230 (a) 400/230 (a) Djibouti 50 400/230 (a) 400/230 (a) Dominica 50 230 (k) 400/230 (a) 400/230 (a) Egypt 50 ± 0.5 380/220 (a) 380/220 (a) 66,000 220 (k) 220 (k) 33,000 20,000 11,000 6,600 380/220 (a) Estonia 50 ± 1 380/220 (a) 380/220 (a) 380/220 (a) 220 (k) 220 (k) Ethiopia 50 ± 2.5 220 (k) 380/231 (a) 15 000 380/231 (a) Falkland Islands 50 ± 3 230 (k) 415/230 (a) 415/230 (a) Fidji Islands 50 ± 2 415/240 (a) 415/240 (a) 11,000 240 (k) 240 (k) 415/240 (a) Finland 50 ± 0.1 230 (k) 400/230 (a) 690/400 (a) 400/230 (a) France 50 ± 1 400/230 (a) 400/230 20,000 230 (a) 690/400 10,000 590/100 230/400 Gambia 50 220 (k) 220/380 380 Georgia 50 ± 0.5 380/220 (a) 380/220 (a) 380/220 (a) 220 (k) 220 (k) Germany 50 ± 0.3 400/230 (a) 400/230 (a) 20,000 230 (k) 230 (k) 10,000 6,000 690/400 400/230 Ghana 50 ± 5 220/240 220/240 415/240 (a) Gibraltar 50 ± 1 415/240 (a) 415/240 (a) 415/240 (a) Greece 50 220 (k) 6,000 22,000 230 380/220 (a) 20,000 15,000 6,600 Granada 50 230 (k) 400/230 (a) 400/230 (a) Hong Kong 50 ± 2 220 (k) 380/220 (a) 11,000 220 (k) 386/220 (a) Hungary 50 ± 5 220 220 220/380 Iceland 50 ± 0.1 230 230/400 230/400 Schneider Electric - Electrical installation guide 2008 C © Schneider Electric - all rights reserved
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General rules of electrical install
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J K L M N P Q General contents Prot
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2 3 4 Chapter H LV switchgear: func
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Chapter A General rules of electrical installation design

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