A power extension cord (also known as a three-phase extension cord) enables efficient and safe operation of energy-intensive devices located at a considerable distance from the power socket. We often encounter such a situation, for example, on construction sites, where extension cords are a condition for access to electricity. Difficult environmental conditions, combined with extensive areas and the need to connect many machines of different power to the electrical installation, require the use of special solutions.
Check out the power extension cords at the Onninen wholesaler
What to look for when choosing a power extension cord?
The best choice for construction sites are insulated power extension cords , in which the wire insulation is made of such durable materials as 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 indicates 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 the extension cord, the choice depends on individual needs and investment requirements - so as not to step on the tangled wire underfoot, nor to constantly pull it out of the power supply. At the same time, it should be remembered that under heavy loads the cable should be unrolled, which prevents the insulation of the wires from melting. 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 version, for convenience, speed and safety of use, should be reel-shaped, i.e. wound on a drum and preferably equipped with wheels that increase mobility. Reel extension cords, also called construction extension cords, are commonly used during construction and renovation work. Sockets, with or without grounding, are located on the side shield.
In the case of a power extension cord for construction, i.e. designed for heavy loads, the construction of the cord is of great importance. The number of cores and the cross-section matter.
We recommend consulting a qualified electrician or other specialist familiar with the subject when purchasing the optimal power extension cord (not only for construction). Onninen experts are available to provide professional assistance.
Where is a power extension cord best suited?
A power extension cord (also known as a three-phase extension cord) is a professional accessory with a suitably insulated wire, increased core thickness, and various special functions. It enables the power supply of powerful devices and machines, such as drills or electric saws, ensuring their safe and efficient operation regardless of external conditions. For this reason, power extension cords work best on construction sites, in car workshops, factories, or mines.
What tightness should a power extension cord have?
The IP coefficient indicates the resistance of the electrical device housing 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 model can only be used indoors. On the other hand, for an outdoor construction site, it is best to choose an IP44 power extension cord, resistant to dust and water splashes.
Power extension cords at the Onninen wholesaler
In the offer of the Onninen electrical wholesaler you will find multifunctional power extension cords on a metal and plastic drum, durable and easy to wind/unwind. Models with an increased tightness class are ideal for construction sites, when working with devices and machines of various powers.
Check out the power extension cords at the Onninen wholesaler