The differences between power cables and control cables

02.10.15 | in: Telecommunications, Electrical
The differences between power cables and control cables
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What are the differences in functions of power cables and control cables?

Power cables transfer both high energy and low energy from the source to the equipment, while control cables send signals to control the functioning of equipment. Power cables also carry a higher threshold of voltage in comparison to control cables.

What are the physical differences between power cables and control cables?

In order to transfer high volumes of energy without tension or strain, power cables are equipped with a thick outer shell. This shell is essential for safety and practicality reasons, the thick outer shell reduces the risk of electricity escaping the cable, as well as increases the life-span of the cable, enabling the cable to become resistant to termites and deterioration (by flames, termites and UV rays).

Power cables also have a unique colour code system that distinguishes the high voltage carriers from their low voltage counterparts, unlike that of control cables.

Control cables, on the other hand, are designed to distribute data or signals with a low voltage (typically to a maximum of 40 volts). Control cables offer superior resistance to interference, which makes them ideal for sending low voltage signals. These cables usually bear a PVC insulation that protects them from impacts and harsh climatic conditions; however, this insulation shell is typically thinner than that of a power cable.