Power Strips

Power Strips: Expanding Connection Points

A power strip, often referred to as a distribution box or socket block, enables you to connect multiple devices to a single wall outlet. These are especially practical in situations where extra outlets are needed. In addition to basic models, various variants are available, each with its own advantages:

• Standard Power Strips: These come in versions with varying numbers of sockets, for example, from 3-way up to even 12-way. They are suitable for devices with low to moderate power consumption, such as chargers, lamps, or computer monitors.
• Power Strips with Switch: To manage power consumption, some models feature a central on/off switch that provides or cuts off power to all connected devices at once. For more control over individual devices, there are also power strips with independently switchable sockets.
• Power Strips with USB Ports: For added convenience, modern power strips often integrate USB-A and USB-C ports. This allows mobile devices such as smartphones and tablets to be charged directly, without the need for extra adapters. Some models support fast-charging technologies such as Power Delivery (PD).
• Surge Protection: To safeguard sensitive electronics, there are power strips with built-in surge protection. These minimize the risk of damage from unexpected voltage spikes in the network.
• Specialized Models: Moreover, specialized power strips are available, such as wall-mount variants, compact desktop models, or power strips with a flat plug—useful for placing behind furniture. For outdoor use, a power strip with the appropriate IP rating is essential.

Extension Cords: Bridging Distances

An extension cord serves to bridge the physical gap between a power source and an electrical device. It consists of a flexible cable with a plug at one end and a connector at the other. The right choice depends on the required length and the power of the connected equipment.

Length and Cable Thickness: Impact on Power Transmission

Extension cords are available in various lengths. The length, and especially the diameter of the copper conductors (conductor thickness, expressed in mm² or AWG), determine the maximum capacity that can be safely transmitted. A thicker cable (lower AWG number, higher mm² value) can handle more current and is better suited for heavy equipment and longer distances. The table below gives an indication of capacity:

With longer cables, voltage drop can occur. Choose an appropriate conductor thickness for the required length and load.

Extension Cables for Indoor and Outdoor Use

Outdoor extension cables are specifically constructed to withstand various weather conditions. These cables can be identified by their sturdy rubber or neoprene sheathing and a higher IP rating (at least IP44). The most common types that can handle different loads and environmental factors are:

• H05RR-F: This is a lighter rubber cable, suited for limited mechanical strain. It is a suitable choice for household appliances and light tools and can be used temporarily outdoors under minimal stress.
• H05RN-F: A sturdier rubber cable with a neoprene jacket. This cable is more resistant to oil, chemicals, and higher mechanical stress. It is suitable for kitchen appliances, medium-duty industrial tools, and for outdoor use with limited chemical exposure.
• H07RN-F: This is the heavy-duty rubber cable, designed to withstand heavy mechanical loads, oil, chemicals, UV radiation, and harsh weather conditions. These cables are commonly used on construction sites, in agriculture, and for mobile power supplies where durability is crucial.

Cable Reels: Power & Storage Convenience for Long Distances

Cable reels provide an organized solution for using and storing long extension cords. They often combine multiple connection points and are particularly practical on construction sites, in large gardens, or at events where a flexible and powerful power supply is needed.

Key Features and Considerations for Cable Reels

• Winding Mechanism: The reel's design makes it easy to neatly wind and unwind the cable. This minimizes tripping hazards and enhances cable lifespan.
• Thermal Protection: Many reels feature built-in thermal protection that cuts off current in case of overheating. This is an important safety feature, as a coiled cable can overheat under high load due to the so-called 'coil effect.' It is therefore advised to always fully unwind a cable reel when using devices with high power consumption (over 1,000 Watts).
• Rugged Construction: Cable reels for professional use often have a robust metal or impact-resistant plastic frame. This provides durability against heavy use and various environmental factors.
• IP Rating and Certifications: Pay attention to the IP rating when choosing cable reels, especially for outdoor use. An IP44 classification indicates splash waterproofing. Products with CE, KEMA-KEUR, GS, VDE, or TÜV certifications offer assurance of quality and safety.

Safe Use of Power Distribution: Practical Considerations

Regardless of the type, safety is paramount when using power strips, extension cords, and reels to avoid the risks of overloading and fire. Adhering to these guidelines contributes to a safe working environment:

• Avoid Overloading: Always check the maximum power (Wattage) that the power strip, extension cable, or cable reel can handle. Add up the wattage of all connected devices. If this exceeds the capacity of the item being used or the electrical circuit, overheating, short circuits, or fire may occur. Preferably, connect high-powered devices (such as kettles, heaters, construction tools) directly to a fixed wall socket.
• No Daisy-Chaining: Never connect multiple power strips or extension cords together. This practice greatly increases the risk of overloading and hazards.
• Suitable Environment: Use indoor extension cords and power strips only in dry areas. For damp environments or outdoors, only products with the correct IP rating (at least IP44 for splashproof) are suitable.
• Inspect for Damage: Regularly check cables and enclosures for cracks, wear, burn marks, or discoloration. Damaged items must not be used and should be replaced.
• Fully Unwind Reels: Always fully unwind cable reels before use, especially with high-powered devices. This prevents heat buildup in the coiled cable.
• Temporary Use: Power strips and extension cords are intended for temporary use. For permanent power points in a fixed location, installing a fixed outlet by a qualified electrician is a safe choice.
• Cable Management: Make sure cables are neatly placed and do not pose a tripping hazard. Avoid running cables under carpets or through doors, as this can cause heat buildup and damage the cable.

Choosing the Right Installation Material

Selecting the right power strip, extension cable, or cable reel depends on your specific needs. Consider how many outlets are needed, the total power demand of connected devices, the distance to be bridged, and the environment (indoors or outdoors). A well-considered choice guarantees a reliable power supply wherever you need it.