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Current Ratings for NYKY 0.6/1 kV
The guidelines for current carrying capacities of copper and aluminum are valid DIN VDE 0265 and 0276 part 1000.
The current carrying capacity of a cable should be limited in such a degree that at all locations in a cable system which causes the generated heats under given proportions to lead safely in the environment. The heat flow depends on the inner heat-resistance between conductor and outer surface of the cable and as well as from the heat emission to the surroundings.
For cables laid in earth, the assumption for the calculation are chosen in a way that the given values for current loading at normal operation can be used in most of the cases without conversion.
For single cables laid directly in earth at EVU-Loading and a specific earth heat-resistance of 100 K x cm/W, mostly of the soil conditions are to be taken into consideration.
Calculation basis
EVU-load (current loading grade)
0.7 (1.0 for air)
Specific earth heat-resistance
100 K x cm/W
Specific heat-resistance of the insulation and jacket
600 K x cm/W
Bedding depth in earth
0.7 m
Earth temperature
20°C
Ambient temperature in the air
30°C
Current carrying capacity of 3-, 4- and multi conductor (5 conductors and more) cables at ambient temperature of 20°C in earth, 30°C for the air.
Current carrying capacity in ampere (A):
Cross-section
in mm²
3 & 4-conductor cables
5 to 61 conductor cables
Ground
A
Air
A
Ground
A
Air
A
1.5
28
18.5
Number of loading conductors and conversion factors from 1.5 to 10 mm² see following table
2.5
37
27
4
48
36
6
60
45
10
80
62
16
103
81
25
134
110
35
162
134
50
192
163
70
235
205
95
283
253
120
323
294
150
363
334
185
412
386
240
478
457
300
542
529
400
615
610
Current loading for multi conductor cables (5 conductors and more)
The current loading of each conductor for cables with a conductor cross-section of 1,5 to 10 mm2, depends on the number of conductors and the number of loaded conductors respectively and is calculated by means of the following conversion factors.
The conversion factors according to the number of loaded conductors are to be multiplied with the loading values of the above table.
Number of loading conductors
Conversion factors for the value 1.5 to 10 mm²
Ground
Air
5
0.70
0.75
7
0.60
0.65
10
0.50
0.55
14
0.45
0.50
19
0.40
0.45
24
0.35
0.40
40
0.30
0.35
61
0.25
0.30
Note
During the installation in earth or in the air, for the operation and the laying performance occur any deviations or unfavorable relations (e.g. bundling of cables, in the wall, under plaster, on the wall or on trays, on cable troughs or on cable racks), the specified conversion factors to DIN VDE 0276 part 1000 table 12 and 13 must be taken into consideration.
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Our Enclosures can be equipped with Strain Relief Fittings, Circular Connectors or Conduit Fittings. Other customization options like cutting & drilling are also available.
Conduit System
High Pull-Out Resistance, Robust Performance, Long Life Expectancy, Fastest/ Easy installation, No Tools required!
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Conduit: Standard and Super Flex Corrugated Conduit Accessories: Snap-In Mounting Brackets. NEMA 4 (IP 54/65) Approvals: RoHS, Deca BDE, UR, German Lloyd, CE, etc.
Hazardous Location / Explosive Proof Cord Grips, Cable Glands
These fittings are labeled and approved to withstand the required needs of a combustible environment. Materials: Nylon, Nickel Plated Brass, PVDF (chemical resistant & extreme temperatures), Stainless Steel. Threads: NPT, Metric & PG. NEMA 4x (IP 67) and 6 (IP 68/69K)
Approvals: RoHS, Deca BDE, UL, CSA, VDE, CE, EEx e, ATEX, German Lloyd, IECEx,
Ex-d/Ex-e, Ex-i EXIOS - High-end Cable Glands for armored cables in hazardous areas including the latest IECEx and ATEX certifications, for use in Ex-e, Ex-d and Ex-tD areas
Thread Adapters, Enlargers, Reducers
Convert, Increase or Decrease your thread size with our newest product line of Adapters, Enlargers and Reducers. Threads: NPT, Metric and PG. Materials: Black or Gray Nylon, Nickel Plated Brass, Aluminum, Stainless Steel. Approvals: RoHS, Deca BDE, CE, EEe x, ATEX, etc.
Hazardous / Explosive proof versions available.
All-weather, Rubber & Welding
Circular Connectors (M16, M23, RJ45, M27 and M40)
Industrial Enclosures (Plastic & Metal)
Conduit System
Hazardous Location / Explosive Proof Cord Grips, Cable Glands
Thread Adapters, Enlargers, Reducers
Cable Accessories