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Current Ratings for HELUTHERM® 145

For permanent operating at Ambient temperature of 30°C. Conversion factors for the deviating site operating conditions - see tables below.
Sufficiently large or ventilated rooms in which the ambient temperature is not noticeably increased by the heat loss from the cable. Protection should be taken from the solar radiation etc.

Installation installation in open air
in open air
installation on surface without contact
on surface
without contact
on surface with contact
on surface
with contact
in tubes, conduits, cabinets
in tubes,
conduits, cabinets
Conversion factors
for grouping
- table 1 table 2 table 3
Cross-section mm² Current Ratings in Ampere (A) up to 30°C ambient temperature
0.25 13 12 9 7
0.33 17 15 11 9
0.50 19 18 12 10
0.75 24 23 17 13
1.0 31 30 20 17
1.5 39 36 25 20
2.5 51 48 33 26
4 68 65 45 36
6 88 84 58 46
10 121 116 80 64
16 160 152 106 85
25 211 200 140 111
35 261 248 172 138
50 320 304 211 169
70 411 391 272 217
95 502 476 331 265
120 587 558 387 310
150 680 646 449 359
185 781 743 516 413
240 931 884 614 492

Conversion factors for grouping
Number of single conductor cables for 2-phase or 3-phase systems 1 2 3 4 5 6 7 8 9 10 12
Table 1 Factor 1.00 0.94 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90
Table 2 Factor 1.00 0.85 0.79 0.75 0.73 0.72 0.72 0.71 0.70 - -
Table 3 Factor 1.00 0.80 0.70 0.65 0.60 0.57 0.54 0.52 0.50 0.48 0.45

Conversion factors for deviating ambient temperatures
Temp. in °C 20 30 40 50 60 70 80 90 95 100 105 110 115
Factor 1.05 1.00 0.94 0.88 0.62 0.75 0.67 0.58 0.53 0.47 0.41 0.35 0.24
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Sealcon is the Exclusive Importer of HUMMEL products. We offer over 6,000 different Types and Sizes of RoHS Compliant Liquid Tight Strain Relief Fittings, Cord Grips, Cable Glands, Circular Connectors, Conduit System, Industrial Enclosures and Other Related Cable Management Products which are rated the best in the industry.
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