A power extension cord (also known as a three-phase cord) enables effective and safe operation of energy-consuming devices that are located at a considerable distance from the power socket. We often encounter such a situation, among others: on construction sites, where extension cords are a requirement for access to electricity. Difficult environmental conditions, combined with vast areas and the need to connect many machines with different power to the electrical installation, require the use of special solutions.
Check out power extension cords at the Onninen wholesaler
What should you pay attention to when choosing a power extension cord?
Insulated power extension cords work best on construction sites, with the wire insulation made of such durable materials as a modern rubber coating or synthetic rubber (neoprene). Insulated cables in this way are extremely resistant to weather conditions and remain flexible even when the ambient temperature drops below zero.
You should pay special attention to the tightness class of the extension cord (you can read more about this parameter later in our guide) and the IK (Impact Protection) protection level, which determines the resistance of electrical device housings to impacts and mechanical damage. For maximum water resistance, power sockets should have additional protection in the form of protective flaps.
When it comes to the optimal length of an extension cord, the choice depends on individual needs and investment requirements - so as not to either step on the cable getting tangled under your feet or constantly unplug it from the power supply. At the same time, remember that under heavy loads, the cable should be unrolled to prevent melting of the wire insulation. On construction sites, where the power socket is located at a considerable distance, a 50 m power extension cord is often found.
Such a long variant, for convenience, speed and safety of use, should be drum-type, i.e. wound on a drum and preferably equipped with wheels to increase mobility. Drum extension cords, also called construction extension cords, are commonly used during construction and renovation works. The sockets, with or without grounding, are located on the side disc.
In the case of a construction power extension cable, i.e. one intended for heavy loads, the structure of the cable is important. What matters is the number of veins and cross-section.
We recommend consulting the purchase of an optimal power extension cord (not only for construction purposes) with a qualified electrician or another specialist familiar with the subject. Onninen experts provide professional assistance.
Where is the best place to use a power extension cord?
A power extension cable (also known as a three-phase extension cable) is equipment intended for professional use, with a properly insulated cable, increased wire thickness and various special functions. It enables powering powerful devices and machines, e.g. drills or electric saws, ensuring their safe and efficient operation regardless of external conditions. For this reason, power extension cords are best used on construction sites, car workshops, factories and mines.
How tight should a power extension cord be?
The IP coefficient indicates the resistance of the housing of an electrical device to water and dust. Power extension cords can have different tightness classes: IP20, IP24, IP44, etc. There is no better or worse tightness. This parameter, like the number of phases, should be adjusted to specific needs and applications. The tightness of the purchased power extension cord should correspond to the environmental conditions. The IP20 class model can only be used indoors. However, for an outdoor construction site, it is best to choose a power extension cord with IP44, resistant to dust and water splashes.
Power extension cords at the Onninen wholesaler
The Onninen electrical wholesaler 's offer includes multifunctional power extension cords on a metal and plastic drum, durable and easy to roll/unwind. Models with a higher tightness class are ideal for construction sites, when working with devices and machines of various powers.