Calculate cross-section and conversion factors for cables and wires

Current-carrying capacity: tables

(Extract from VDE 0298-4 06/13 tables: 11, 17, 18, 21, 26 and 27)

Current-carrying capacity, cables with a nominal voltage up to 1000 V and heat resistant cables VDE 0298-4 06/13 table 11, column 2 and 5
	column 2	column 5
way of laying	in air	on or at surfaces
	mono conductors - rubber insulated - PVC insulated - heat resistant	Multi conductor cables (except for house or handheld units) - rubber insulated - PVC insulated - heat resistant
Number of charged conductors	1	2 or 3
Nominal section	Capacity (Ampere)
0,75 mm²	15A	12A
1,00 mm²	19A	15A
1,50 mm²	24A	18A
2,50 mm²	32A	26A
4,00 mm²	42A	34A
6,00 mm²	54A	44A
10,00 mm²	73A	61A
16,00 mm²	98A	82A
25,00 mm²	129A	108A
35,00 mm²	158A	135A
50,00 mm²	198A	168A
70,00 mm²	245A	207A
95,00 mm²	292A	250A
120,00 mm²	344A	292A
150,00 mm²	391A	335A
185,00 mm²	448A	382A
240,00 mm²	528A	453A
300,00 mm²	608A	523A

Current-carrying capacity of cables for deveating ambient temperatures VDE 0298-4 06/13, table 17, column 4¹)
Ambient temperature	Factor
10 °C	1,22
15 °C	1,17
20 °C	1,12
25 °C	1,06
30 °C	1,00
35 °C	0,94
40 °C	0,87
45 °C	0,79
50 °C	0,71
55 °C	0,61
60 °C	0,50
65 °C	0,35

1) for cables with a service temperature of max. 70°C at the conductor

Current-carrying capacity of cables for multi-core cables with a nominal section up to 10 mm² VDE 0298-4 06/13 table 26. With installation in the open air.
No. of the loaded cores	Factor
5	0,75
7	0,65
10	0,55
14	0,50
19	0,45
24	0,40
40	0,35
61	0,30

Current-carrying capacity of cables for diviating ambient temperatures for heat resistant cables VDE 0298-4 06/13 table 18, column 3-6
	column 3	column 4	column 5	column 6
	zulässige Betriebstemperatur
	90°C	110°C	135°C	180°C
ambient temperature	conversion factors, to apply to the capacity of heat resistant cables in table 11, column 2 and 5
up to 50 °C	1,00	1,00	1,00	1,00
55 °C	0,94	1,00	1,00	1,00
60 °C	0,87	1,00	1,00	1,00
65 °C	0,79	1,00	1,00	1,00
70 °C	0,71	1,00	1,00	1,00
75 °C	0,61	1,00	1,00	1,00
80 °C	0,50	1,00	1,00	1,00
85 °C	0,35	0,91	1,00	1,00
90 °C	-----	0,82	1,00	1,00
95 °C	-----	0,71	1,00	1,00
100 °C	-----	0,58	0,94	1,00
105 °C	-----	0,41	0,87	1,00
110 °C	-----	-----	0,79	1,00
115 °C	-----	-----	0,71	1,00
120 °C	-----	-----	0,61	1,00
125 °C	-----	-----	0,50	1,00
130 °C	-----	-----	0,35	1,00
135 °C	-----	-----	-----	1,00
140 °C	-----	-----	-----	1,00
145 °C	-----	-----	-----	1,00
150 °C	-----	-----	-----	1,00
155 °C	-----	-----	-----	0,91
160 °C	-----	-----	-----	0,82
165 °C	-----	-----	-----	0,71
170 °C	-----	-----	-----	0,58
175 °C	-----	-----	-----	0,41

Current-carrying capacity of cables for the accumulation on walls, in tubes and conduits, on the floor and at the ceiling VDE 0298-4 06/13 table 21
No. of multi-core cables (2 or 3 current-carrying cores)	Factor
1	1,00
2	0,80
3	0,70
4	0,65
5	0,60
6	0,57
7	0,54
8	0,52
9	0,50
10	0,48
12	0,45
14	0,43
16	0,41
18	0,39
20	0,38

The maximum current-carrying capacity acc. to VDE 0891 part 1 point 7 has to be considered for the application of insulated cables in telecommunication systems and data processing units.

Current-carrying capacity of cables for wound up cables VDE 0298-4 06/13 table 27
1	2	3	4	5	6
no. of layers on one drum	1	2	3	4	5
conversion factors	0,80	0,61	0,49	0,42	0,38
Note: for spiral winding the conversion factor is of 0,80 is valid

Current-carrying capacity: tables

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