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V1.0

08/04/20

H07RN-F / BS EN 50525-2-21

Flexible Rubber Cable

Newark.com/multicomp-pro

Farnell.com/multicomp-pro

Element14.com/multicomp-pro

Nominal

Cross

Sectional

Area

mm2

60°C Conductor

Operating Temperature

85°C Conductor Operating Temperature**

Single-Phase

AC or DC

Three-Phase AC

Single-Phase AC or DC

Three-Phase AC

1 Two Core Cable, With

or Without Protective

Conductor

Amps

1 Three Core,

Four Core or

Five Core Cable

Amps

1 Two Core Cable, With

or Without Protective

Conductor

Amps

1 Three Core,

Four Core or

Five Core Cable

Amps

4

30

26

41

36

6

39

34

53

47

Nominal Cross

Sectional Area

mm2

Two Core Cable, DC

mV/A/m

Two Core Cable,

Single-Phase AC

mV/A/m

1 Three Core,

Four Core Or Five Core Cable,

Three-Phase AC

mV/A/m

4

12

12

10

6

7.8

7.8

6.7

Electrical Characteristics (4mm2 and above)

Current Carrying Capacity

Voltage Drop

Ambient temperature: 30°C

Conductor operating temperature: 60°C / 85°C

The above table for 60°C conductor operating temperature is in accordance with Table 4F1A of the 17th Edition of IEE Wiring

Regulations

** 85°C Table is in accordance with Table 4H2A of the 16th Edition of IEE Wiring Regulations.

The current ratings tabulated are for cables in free air but may also be used for cables resting on a surface. If the cable is to

be wound on a drum on load the ratings should be reduced in accordance with NOTE 2 below and for cables which may be

covered, NOTE 3 below.

2. Flexible cables wound on reeling drums

The current ratings of cables used on reeling drums are to be reduced by the following factors:

a) Radial type drum

b) Ventilated cylindrical type drum

ventilated: 85%

1 layer of cable: 85%

unventilated: 75%

2 layers of cable: 65%

3 layers of cable: 45%

4 layers of cable: 35%

A radial type drum is one where spiral layers of cable are accommodated between closely spaced flanges; if fitted with solid

flanges the ratings given above should be reduced and the drum is described as non-ventilated. If the flanges have suitable

apertures the drum is described as ventilated.

A ventilated cylindrical cable drum is one where layers of cable are accommodated between widely spaced flanges and the

drum and end flanges have suitable ventilating apertures.

3. Where cable may be covered or coiled up whilst on load, or the air movement over the cable restricted, the current rating

should be reduced.

It is not possible to specify the amount of reduction but the table of rating factors for reeling drums can be used as a guide.

Conductor operating temperature: 60°C