- Published 10 Feb 2023
- Last Modified 15 Aug 2024
- 10 min
Comprehensive Fused Spurs Guide for Buyers
Understand the different types of fused spurs, their uses, popular brands, and how to choose the right one for specific application. Our comprehensive guide covers everything you need to know.
What are Fused Spurs?
Fused spurs, also known as fused connection units (FCUs) or fused spur switches, are electrical devices commonly used in wiring installations. They are essentially electrical switches that incorporate an individual fuse, which is an electrical component designed to protect against shocks and electrical fires by breaking the connection in the event of excessive current.
Fused spurs are directly wired connections between an electrical cable and an appliance, meaning they do not use a plug and socket. This makes them a more permanent solution compared to plugs and sockets. Due to their direct wiring, it is advisable that fused spurs are only installed or removed by a qualified electrician.
Fuses fall under the broader category of electrical components called 'circuit breakers', all of which have a similar function of breaking the circuit in case of an overload or short circuit. Fused spurs provide a convenient and safe way to connect electrical appliances or equipment to the mains electricity supply while incorporating built-in fuse protection.
Choosing the Right Fused Spur
When selecting a fused spur for your home or commercial space, it's crucial to consider the specific requirements of your installation and the appliances you'll be powering. The type of fused spur you choose can significantly impact safety, functionality, and energy efficiency. Let's explore the different types of fused spurs and their applications to help you make an informed decision.
Switched Fused Spurs
Switched fused spurs, also known as fused spur switches, feature a manual on/off button that allows users to easily control the power supply to the connected appliance. These types of fused spurs are ideal for devices that may not require continuous power, such as heaters or appliances that are used intermittently. They provide the convenience of being able to turn the power off when the appliance is not in use, potentially saving energy and reducing the risk of accidents.
Unswitched Fused Spurs
In contrast, unswitched or non-switched fused spurs do not have a manual switch. These types of fused spurs are commonly used with appliances that require a constant power supply, such as freezers, refrigerators, or security lights. They ensure that essential devices remain operational without the need for user intervention, providing a reliable and uninterrupted power source.
Single Pole Fused Spurs
Single pole fused spurs feature a simpler isolation mechanism that affects only the live wire when switched off, leaving the neutral wire energized. While they have a lower safety rating compared to double pole models, single pole fused spurs are suitable for lower-risk applications where full isolation is not a primary concern.
Double Pole Fused Spurs
Double pole fused spurs offer enhanced safety by isolating both the live and neutral wires when switched off, providing complete disconnection from the power source. These types of fused spurs are recommended for higher-voltage appliances, such as boilers, where full isolation is crucial for safety and maintenance purposes.
Fused Spurs with Timers
Another variant of fused spurs is the timer-equipped model, which allows users to set specific operating hours for appliances like immersion heaters, water pumps, or lighting systems. This feature is particularly useful for managing energy consumption and ensuring devices operate only when needed, contributing to cost savings and environmental sustainability.
Fused Spur Current Ratings
One of the most important factors to consider when choosing a fused spur for your electrical installation is the current rating. The current rating determines the maximum amount of electrical current the fused spur can safely handle without overloading or causing potential hazards. The most commonly used fused spurs are available in the following amperages:
- 10 Amp Fused Spurs: 10-amp fused spurs are suitable for powering smaller appliances and devices that require a lower current draw. They are often used for lighting circuits, low-power heating systems, and other applications where the total current demand is relatively low.
- 13 Amp Fused Spurs: 13-amp fused spurs are the most widely used and versatile option, as they are compatible with the standard 13-amp plug used for many household appliances. These fused spurs can handle the current requirements of a wide range of devices, from kitchen appliances to entertainment systems.
- 20 Amp Fused Spurs: 20-amp fused spurs are designed for higher-power applications that require a larger current capacity. They are commonly used for powering heavy-duty appliances, such as electric ovens, cooktops, and larger heating systems. These fused spurs ensure that the electrical circuit can handle the increased current demand without the risk of overloading or tripping the fuse.
- Less Common Amperages: While less common, 3-amp and 5-amp fused spurs are also available for specific applications. 3-amp fused spurs are suitable for low-power devices like clocks or small transformers, while 5-amp fused spurs can be used for certain types of lighting circuits or small appliances.
The Role of Fused Spurs in Domestic Electrical Systems
Fused spurs are specialised electrical devices that serve as an alternative to conventional plug sockets, specifically designed for high-power and high-voltage appliances. They are commonly utilised in domestic settings for a variety of essential household equipment, including ovens, dishwashers, washing machines, boilers, thermostats, and refrigerators. Fused spurs are particularly advantageous in applications where safety and reliability are important, such as in bathrooms where electric heaters may be installed.
Key Functions of Fused Spurs
The primary function of a fused spur is to provide a secure and dedicated electrical connection for appliances, allowing them to operate on a separate cable that branches off from the main electrical circuit, known as the ring main. This configuration not only enhances safety but also minimises the risk of overloading the circuit. By operating outside of the ring main, fused spurs offer an additional layer of protection, ensuring that high-demand devices can function without compromising the integrity of the overall electrical system.
Fused Spurs vs RCD Sockets
It is essential to distinguish fused spurs from residual current device (RCD) sockets. While both serve protective functions, RCD sockets are designed to automatically disconnect the live current in the event of a fault or short circuit, thereby preventing electrocution. In contrast, fused spurs rely on a fuse to break the circuit when excessive current is detected, protecting the appliance and the wiring from potential damage.
Applications in Various Settings
Fused spurs are widely used in various applications, including:
- Kitchen Appliances: High-powered devices like ovens, microwaves, and dishwashers often require a dedicated supply for optimal performance and safety.
- Laundry Equipment: Washing machines benefit from the reliability of fused spurs, ensuring they operate efficiently without risk of circuit overload.
- Heating Systems: In bathrooms and other areas where heating is necessary, fused spurs provide a safe connection for electric heaters and thermostats.
- Refrigeration Units: Fused spurs are ideal for refrigerators and freezers, ensuring they maintain a constant power supply without interruption.
Popular Fused Spur Brands
Choosing a reliable brand can ensure that your fused spur meets safety standards, functions efficiently, and provides long-lasting performance. In this section, we'll explore some of the most popular and trusted fused spur brands on the market.
MK Electric
MK Electric is a well-established brand with a reputation for manufacturing top-quality electrical accessories. Their fused spurs are known for their sleek design, ease of installation, and compliance with industry standards. MK Electric offers a variety of fused spur types, including switched and unswitched models, as well as options with timers and different current ratings.
RS PRO
RS PRO, our in-house brand, are known for the high-quality electrical components, including a wide range of fused spurs. Our products are designed to meet stringent safety standards and offer features like double pole isolation, switched and unswitched options, and compatibility with various current ratings. RS PRO fused spurs are a popular choice among electricians and homeowners due to their durability, reliability, and competitive pricing.
Schneider Electric
Schneider Electric is a global leader in energy management and automation solutions. Their range of electrical products includes high-quality fused spurs, designed to provide enhanced safety features and energy efficiency. Their products are suitable for a wide range of applications, including residential, commercial, and industrial settings, making them a versatile choice for various electrical needs.
Contactum
Contactum is a brand that specialises in electrical components, including fused spurs, and known for their commitment to quality and safety. Contactum offers a variety of fused spur models, catering to different power requirements and installation scenarios. Their products are often praised for their reliability and ease of use, making them a favoured choice among professionals in the electrical field.