What Is a Flat Cable? H07VVH6-F Submersible Pump and Lift Cable Selection
A flat cable carries its cores side by side in a flat sheath; the H07VVH6-F type is used for submersible pump and lift lines. It is chosen by cross-section, core count, protective conductor and voltage drop.
This guide explains what to check when choosing products in the Flat Cables category.
What is a flat cable?
A flat cable is a flexible cable whose cores run side by side inside a flat sheath instead of a round bundle. All HES Kablo and Türen Kablo products in the category are of type H07VVH6-F and are named as submersible pump and lift cables. The product data sheets refer to TS EN 50214 and IEC 60227-6; these standards address lift cables and flexible connection cables.
What does the H07VVH6-F code mean?
| Code part | Meaning |
|---|---|
| H | Harmonized (common European) type |
| 07 | Rated voltage 450/750 V |
| V | PVC core insulation |
| V | PVC outer sheath |
| H6 | Flat, non-divisible construction |
| F | Fine-stranded flexible copper conductor (class 5) |
The HES data sheet gives a maximum conductor temperature of 70 °C and a short-circuit temperature of 160 °C (5 seconds at most). The Türen data sheet states an operating range of -15 °C to +70 °C, a minimum bending radius of 10 times the cable diameter and a test voltage of 2.5 kV; the cable's single-cable vertical flame test is IEC 60332-1-2.
Core count and protective conductor: G and x notation
In standard size notation, G means one core is the green-yellow protective (earth) conductor, while x means there is no protective conductor. Türen products are written with G and marked as earthed in the data sheet; for example, 4G2.5 mm² carries three phase conductors and one protective conductor. Product names do not always use x in this strict sense; for HES products, confirm in the data sheet whether there is a protective conductor and which core colors are used.
- Single-phase supply: a 3G construction carries phase, neutral and protective conductor.
- Three-phase supply: for a three-phase motor that needs no neutral, a 4G construction carries three phases and the protective conductor. If a 3x or 4x construction without a protective conductor is chosen, earthing must be provided separately.
- 7G to 24G, 1.5 mm²: applications that combine many small-current circuits in one cable, such as lift car control, signal and lighting lines.
Cross-section and current ratings
The HES data sheet gives the following current ratings for H07VVH6-F by cross-section; the value is the same for 3-core and 4-core constructions. Outer dimensions are the width and thickness of the 4-core cable.
| Cross-section | HES current rating | HES 4x outer size | Türen 4G outer size | Max. DC resistance (20 °C) |
|---|---|---|---|---|
| 1.5 mm² | 20 A | 14.6 x 4.9 mm | 14.5 x 4.9 mm | 13.3 Ω/km |
| 2.5 mm² | 27 A | 18.0 x 5.6 mm | 18.0 x 6.4 mm | 7.98 Ω/km |
| 4 mm² | 34 A | 20.4 x 6.6 mm | 20.2 x 7.1 mm | 4.95 Ω/km |
| 6 mm² | 44 A | 22.4 x 7.1 mm | 22.4 x 8.0 mm | 3.3 Ω/km |
| 10 mm² | 61 A | 28.8 x 9.1 mm | 28.0 x 9.0 mm | 1.91 Ω/km |
| 16 mm² | 82 A | 33.2 x 10.3 mm | 33.7 x 10.5 mm | 1.21 Ω/km |
| 25 mm² | 108 A | 40.4 x 12.3 mm | 40.0 x 12.6 mm | 0.78 Ω/km |
The table shows the sizes for which the data sheet gives a current rating; the category also has 3-core HES up to 70 mm², Türen 3G up to 95 mm² and 4G up to 50 mm². The current rating applies to the manufacturer's reference conditions; a cable left on the drum, running in a hot space or bunched with other cables may carry less. To choose the size based on load current, breaker rating and run length together, use the cable size calculator.
Voltage drop on a submersible pump line
In deep wells the cable between the pump and the panel is long, so voltage drop rather than current often sets the size. Example: a 5.5 kW three-phase pump at 400 V, cos φ 0.85 and 85% efficiency draws about 11 A. On a 120 m one-way run the voltage drop is about 4.1% with 2.5 mm², 2.6% with 4 mm² and 1.7% with 6 mm². With the 3% limit for power circuits in Turkish installation regulations, this example needs 4 mm²; 2.5 mm² is enough for the current but exceeds the voltage drop limit. Check your own values with the voltage drop calculator.
Also take the pump manufacturer's cable size table and the motor starting current into account. The data sheets give no values for immersion in water: confirm the maximum permissible immersion depth, water temperature and drinking-water approval in writing with the manufacturer before use.
Flat cable in lifts
The cable that feeds a lift car moves with the car and forms a hanging loop in the shaft. The flat construction lets the cable fold in this loop as a flat strip without twisting around its own axis. Hang the cable with the manufacturer's suspension and strain relief elements, and confirm the free hanging length and car speed limits with the manufacturer. Do not bend the cable tighter than the manufacturer's minimum bending radius; the Türen data sheet gives 10 times the cable diameter, so check in the data sheet which dimension applies to a flat cable. For control and signal lines, choose a core count that leaves spare cores.
Flat cable versus similar cables
- TTR (H05VV-F): TTR cables are round PVC-sheathed flexible cables in the 300/500 V class. They are used for portable appliance supply; for the moving loop in a lift shaft the flat construction is preferred.
- YSLY control cable: YSLY control cables are round cables for fixed or lightly moving control lines.
- NYY: NYY cables are power cables for fixed installation, underground and in ducts; their conductors are not flexible.
Frequently asked questions
What voltage is an H07VVH6-F cable rated for?
The 07 in the code means a rated voltage of 450/750 V. The data sheets of the HES and Türen products in the category also give 450/750 V.
What size flat cable does a submersible pump need?
It depends on the pump current and the total cable length including the well depth. Assuming a 5.5 kW three-phase pump at 400 V, cos φ 0.85, 85% efficiency and a 120 m one-way run, a 3% voltage drop limit needs 4 mm². Use the voltage drop calculator for your own pump power and run length, and compare the result with the pump manufacturer's table.
What is the difference between 4G and 4x?
In standard notation, 4G means one of the four cores is the green-yellow protective conductor, while 4x means there is no protective conductor. Product names may not use x in this strict sense; confirm in the product data sheet whether there is a protective conductor and which core colors are used.