H05G-K/H07G-K
Application and Description
These cables are recommended for the internal wiring of switchboards and distributor boards as well as 1000V. or direct nominal voltage of 750V. These cables are all allowed for laying in tubes in and under plaster.
Standard and Approval
HD 22.7 S2
VDE-0282 Part-7
CEI 20-19/7
CEI 20-35(EN60332-1)
CE Low Voltage Directive 73/23/EEC and 93/68/EEC
ROHS compliant
Cable Construction
Fine bare copper strands |
Strands to VDE-0295 Class-5, IEC 60228 Class-5 |
Rubber compound type EI3 (EVA) to DIN VDE 0282 part 7 insulation |
Cores to VDE-0293 colors |
Technical Characteristics
WORKING VOLTAGE | 300/500v (H05G-K) ; 450/750v (H07G-K) |
|---|---|
TEST VOLTAGE | 2000volts (H05G-K) ; 2500 volts (H07G-K) |
FLEXING BENDING RADIUS | 7 x Ø |
STATIC BENDING RADIUS | 7 x Ø |
FLEXING TEMPERATURE | -25 ºC to +110 ºC |
STATIC TEMPERATURE | -40 ºC to +110 ºC |
FLAME RETARDANT | IEC 60332.1 |
INSULATION RESISTANCE | 10 MΩ x km |
Cable Parameter
AWG | NO. OF CORES X NOMINAL CROSS SECTIONAL AREA | NOMINAL THICKNESS OF INSULATION | NOMINAL OVERALL DIAMETER | NOMINAL COPPER WEIGHT | NOMINAL WEIGHT |
|---|---|---|---|---|---|
# X MM² | MM | MM | KG/KM | KG/KM | |
H05G-K | |||||
20(16/32) | 0.6 | 2.3 | 4.8 | 13 | |
18(24/32) | 0.6 | 2.6 | 7.2 | 16 | |
17(32/32) | 0.6 | 2.8 | 9.6 | 22 | |
H07G-K | |||||
16(30/30) | 0.8 | 3.4 | 14.4 | 24 | |
14(50/30) | 0.9 | 4.1 | 24 | 42 | |
12(56/28) | 1.0 | 5.1 | 38 | 61 | |
10(84/28) | 1.0 | 5.5 | 58 | 78 | |
8(80/26) | 1.2 | 6.8 | 96 | 130 | |
6(128/26) | 1.2 | 8.4 | 154 | 212 | |
4(200/26) | 1.4 | 9.9 | 240 | 323 | |
2(280/26) | 1.4 | 11.4 | 336 | 422 | |
1(400/26) | 1.6 | 13.2 | 480 | 527 | |
2/0(356/24) | 1.6 | 15.4 | 672 | 726 | |
3/0(485/24) | 1.8 | 17.2 | 912 | 937 | |
4/0(614/24) | 1.8 | 19.7 | 1152 | 1192 | |
Introduction
In the realm of industrial electrical installations, the choice of cabling is critical to ensuring safety, reliability, and efficiency. Among the myriad options available, H05G-K and H07G-K harmonized code industrial cables stand out for their versatility and robust performance in demanding environments. These cables, designed for internal wiring in switchboards, distributor boards, and other industrial applications, are engineered to meet stringent European standards, making them a preferred choice in South Africa and beyond.
Applications of H05G-K and H07G-K Cables
H05G-K and H07G-K cables are designed for internal wiring in environments requiring high flexibility and reliability. Common applications include:
Switchboards and Distributor Boards: The cables’ flexibility and high voltage ratings make them ideal for wiring complex switchgear and distribution systems.
Industrial Installations: They are used in manufacturing plants, data centres, and other facilities where reliable power distribution is critical.
Laying in Tubes or Under Plaster: Their robust insulation allows for safe installation in conduits or embedded within building structures.
South African Context: In South Africa, these cables are widely used in mining, manufacturing, and renewable energy sectors due to their ability to withstand harsh environmental conditions, including high temperatures and dust exposure.
Frequently Asked Questions
1. What is the difference between H05G-K and H07G-K cables?
The primary difference lies in their voltage ratings. H05G-K cables are rated for 300/500V, making them suitable for lower voltage applications, while H07G-K cables are rated for 450/750V, ideal for higher voltage requirements. Additionally, H07G-K cables typically have thicker insulation to accommodate the higher voltage, resulting in slightly larger diameters.
2. Are these cables suitable for outdoor use?
While H05G-K and H07G-K cables are primarily designed for indoor applications, such as wiring in switchboards or under plaster, they can be used in protected outdoor environments if installed in conduits or other protective enclosures. Their temperature range (-40°C to +110°C) makes them adaptable to South Africa’s varied climate, but direct exposure to UV radiation or moisture should be avoided.
3. How do these cables ensure safety in industrial settings?
The cables’ flame-retardant properties (IEC 60332.1) and high insulation resistance (10 MΩ x km) minimize fire risks and electrical faults. Their compliance with European safety standards and ROHS regulations further ensures they are safe for use in industrial environments.
4. Can these cables be used in residential installations?
Yes, H05G-K and H07G-K cables can be used in residential settings for internal wiring, particularly in applications requiring high flexibility, such as home automation systems or complex lighting setups. However, their cost may be higher than standard residential cables, so they are typically reserved for specialized applications.
5. How do I select the appropriate cable size?
The choice of cable size depends on the current-carrying capacity, voltage requirements, and installation conditions. For example, a 0.5 mm² H05G-K cable is suitable for low-current applications, while a 120 mm² H07G-K cable can handle high-power loads. Consulting with a qualified electrician and referring to the cable parameters (e.g., nominal copper weight and overall diameter) is recommended.
Advantages and Limitations
Advantages
High Flexibility: The Class-5 copper conductors allow for easy installation in tight spaces.
Wide Temperature Range: Suitable for South Africa’s diverse climate, from coastal humidity to inland heat.
Flame Retardancy: Enhances safety in industrial environments.
Compliance with Standards: Ensures reliability and compatibility with global regulations.
Limitations
Cost: Harmonized cables may be more expensive than non-standard alternatives, which could be a consideration for budget-conscious projects.
Not UV-Resistant: Direct outdoor exposure without protection may degrade the insulation over time.
H05G-K and H07G-K harmonized code industrial cables are a cornerstone of reliable and safe electrical installations in industrial and specialized residential applications. Their robust construction, compliance with international standards, and ability to perform in demanding environments make them a preferred choice in South Africa’s mining, manufacturing, and renewable energy sectors.
