Technical Articles

What are the current preferred ratings of BS 1362 fuses for use in UK plugs to BS 1363?

In the United Kingdom, electrical plugs and sockets must adhere to specific safety standards to ensure the protection of users and electrical systems. British Standard BS 1363 sets the requirements for 13 A fused plugs, commonly used in UK households and commercial premises. A crucial component of these plugs is the BS 1362 fuse, which helps prevent electrical overloads and faults. This article aims to provide an overview of the current preferred ratings of BS 1362 fuses as specified within the BS 1363 standard, ensuring safe and reliable electrical connections.

Understanding BS 1362 Fuses:
BS 1362 fuses are designed to protect electrical circuits and equipment from excessive current, preventing damage and potentially hazardous situations. They are predominantly used in 13 A fused plugs found in UK households, offering a designated current-carrying capacity that enables safe operation of electrical appliances.

Preferred Ratings of BS 1362 Fuses:
According to BS 1363, the preferred ratings for BS 1362 fuses are as follows:

1. 3 A: A 3 A fuse is recommended for appliances that draw a maximum current of 3 amperes. This rating is suitable for small appliances such as lamps, radios, and low-power electronic devices.

2. 5 A: The 5 A fuse is the most commonly used rating in UK household plugs. ItUnderstanding the Current Preferred Ratings of BS 1362 Fuses for Use in UK Plugs to BS 1363


In the United Kingdom, electrical safety standards are rigorously enforced to protect both individuals and property. BS 1363 is the standard for UK plugs, which provide a safe method for connecting electrical devices to the mains supply. Accompanying this standard is BS 1362, which specifies the requirements for fuses used in these plugs. In this article, we aim to provide a comprehensive understanding of the current preferred ratings for BS 1362 fuses, ensuring compliance with UK electrical safety requirements.

BS 1362: Ensuring Fuse Safety

BS 1362 is a British Standard that applies to fuses used in UK plugs to protect against overcurrents and short circuits. The standard specifies the requirements for the design, construction, and performance of these fuses, ensuring their reliability and effectiveness. Adhering to the BS 1362 standard safeguards electrical equipment, prevents fires, and safeguards user safety.

The Current Preferred Ratings:

The current preferred ratings defined by BS 1362 represent the maximum current-carrying capacity of a fuse. These ratings are carefully chosen to protect electrical circuits and devices effectively. According to the current revision of the BS 1362 standard, the preferred ratings for fuses in UK plugs are as follows:

- 3A (yellow label): The 3A fuse is designed for use in plugs connected to appliances with low power requirements, such as lamps, clock radios, and other small household devices. This rating provides adequate protection for devices with low electrical loads and minimizes the risk of overheating or damage in the event of an electrical fault.

- 5A (black label): The 5A fuse is commonly used in plugs connected to medium-power devices, such as televisions, desktop computers, and small kitchen appliances. This rating provides a higher current-carrying capacity to accommodate slightly larger electrical loads without compromising safety.

- 13A (brown label): The 13A fuse is the highest-rated fuse commonly used in UK plugs. It is suitable for appliances with larger power requirements, including larger kitchen appliances, power tools, and high-power electronics. This rating allows for the safe operation of devices with higher electrical currents within the capacity of standard UK mains supplies.

These current preferred ratings are determined based on typical electrical load requirements for various types of common household and commercial appliances. The correct fuse rating should be selected based on the manufacturer's recommendations or the equipment's power consumption specifications.

Ensuring Compliance with Safety Standards:

When selecting and installing a fuse in a UK plug, it is crucial to ensure compliance with the BS 1362 standard and follow best practices to ensure electrical safety. Here are some key considerations:

1. Select the correct fuse rating: Choose a fuse that matches the specific power requirements of the connected device. Using a fuse with a higher rating than necessary may compromise device safety, while a lower-rated fuse can lead to frequent fuse blowouts.

2. Check for the appropriate color-coded marking: The color-coded labels on BS 1362 fuses serve as a visual indicator of their current rating. Verify that the fuse bears the correct label corresponding to its intended application.

3. Regularly inspect and replace fuses: Fuses can degrade over time due to aging and repeated use. Regularly check outlets, plugs, and fuses for signs of damage, and promptly replace any faulty or blown fuses to maintain electrical safety.


Understanding the current preferred ratings of BS 1362 fuses is essential to ensure compliance with UK electrical safety requirements. The 3A, 5A, and 13A ratings specified by BS 1362 provide suitable protection for a wide range of electrical devices commonly used in households and commercial settings. Careful selection and installation of the correct fuse rating minimize the risk of electrical faults, preventing damage to equipment and ensuring the safety of individuals and property. By following the guidelines outlined in the BS 1362 standard, consumers and professionals can confidently choose and install fuses that meet the highest standards of electrical safety in the United Kingdom.



Contact: Eason Wang

Phone: +86-13751010017


Add: 1F Junfeng Building, Gongle, Xixiang, Baoan District, Shenzhen, Guangdong, China

Scan the qr codeclose
the qr code