Rubber Flexible Cable Specifications
H07RN-F is available with either a single core design or multi-core design. Typically, single core mains cables are used for higher current ratings as one line will be used for each of the three phases plus neutral and earth. Standard multi-core lines are available with 2 cores, 3 cores, 4 cores or 5 cores, however some manufacturers offer rubber flexible cable variants with up to 19 conductive cores.
Neoprene (PCP) Sheath
These copper cables use tough rubber sheaths manufactured from neoprene (polychloroprene) which is often referred to as PCP. This material allows improved abrasion resistance and the ability to withstand many oils and chemicals, therefore neoprene sheathed H07RN-F cables are suitable for the most arduous conditions.
Flame Retardant Thermal Performance
The thermal performance of 450/750 volt wires can differ, therefore the below figures are based off Nexans TITANEX. As a renowned brand, TITANEX is flame retardant and operates at industry leading temperatures.
The bend radius of H07RN-F cable can differ slightly from each manufacturer, therefore these figures are based off Nexans TITANEX.
Dynamic Use Bend Radius: 6 to 8 x outer diameter
Static Use Bend Radius: 3 x outer diameter (for Ø < 12 mm) or 4 x (for Ø > 12 mm)
There are 2 common types of termination for H07RN-F cables, crimp and set-screw. For low voltage electrical applications, lugs or single pole connectors are usually terminated for power transfer. The industry standard for safe connections on lead sizes over 35mm2 CSA is powerlock type connectors; Phase 3 use Powersafe. Powerlock cable terminations are available in the industry as lug-to-source, lug-to-drain or source-to-drain. Connectors can be crimped directly onto the copper conductor which is a permanent termination, alternatively set-screw can be applied for a temporary connection. M12 Lugs are also used for terminations to busbars, however they are not considered safe for exposed use due to the lack of insulation.
Cable Sizes & Weights
Trailing cables such as H07 come in a range of sizes and are often to referred to by their Cross Sectional Areas (CSA). Sizes range from 1.5mm2 to around 630mm2, as a result it is important to be aware of the amount of current required. Copper is a particularly heavy material, especially when compared to alternatives like Aluminium.
120mm single core cable is one of the most used in three phase electricity due to its high current ratings. In addition, its thickness and weight is more workable, so productivity and usability remains high. TITANEX 120mm leads will accept a current rating of 382 amps and will require termination with Powersafe 500A connectors.
240mm single core cable is one of the most used in three phase electricity due to its high current ratings. TITANEX 240mm leads will accept a current rating of 599 amps and will require termination with Powersafe 800A connectors.
Table of Single Core H07RN-F Cross Sectional Diameters and Weights
|Nominal Cross-Sectional Area
||Nominal Overall Diameter mm
||Nominal Weight kg/km
The price of H07RN-F cable for the supply of energy differs greatly. Price is determined by the size of the core. In single core and multi-core variations, the price increases depending on the size of the copper conductor and prices can fluctuate depending on the price of copper in the London Metals Exchange (LME). For example, 1.5mm2 TITANEX pricing can start around 60p per-meter, whilst 120mm2 control leads can cost around £12 per-meter. All costing varies by manufacturer and supplier, so shop around to find the best deal for your installation. The benefit to a copper investment is that is often retains a high scrap value.
Why use copper for electrical supply?
While all metals can conduct electricity, certain metals are more commonly used due to being highly conductive. The most common example is Copper (Cu). Copper is highly electrically conductive, as a result it is the most common metal for electrical wiring, in this case used for H07RN-F cable.
Surprisingly, copper is not even the most conductive metal despite being used in many common applications (and the fact it is used as the measuring stick for rating conductivity in metals). Pure Silver is more conductive but not as reliable over long time use, this is why you often see silver plating used on electrical contacts.
|Material IACS (International Annealed Copper Standard)
||Steel (Stainless included)
||Nickel Aluminium Bronze
* Conductivity ratings are expressed as a relative measurement to copper. A 100% rating does not indicate no resistance.