Circuit Protection

Circuit Breakers: Circuit breakers are essential devices for protecting electrical circuits. BS 7671 specifies requirements for the selection and installation of circuit breakers. They come in various types, including:
- Miniature Circuit Breakers (MCBs): MCBs are commonly used to protect individual circuits. They trip when there’s an overload or a short circuit.
- Residual Current Devices (RCDs): RCDs are designed to protect against electric shock. They disconnect the circuit if they detect an imbalance in current, indicating a fault.
- Combination RCD/MCB Devices: These devices combine the functions of both MCBs and RCDs in a single unit. They are often used for socket outlets.
Fuses: While less common in modern installations, fuses may still be used for circuit protection. They work by melting when there’s an excess current, breaking the circuit.
Overcurrent Protection: BS 7671 requires that circuits are protected against overcurrents. This is typically achieved through the use of circuit breakers, fuses, or other protective devices.
Earthing and Bonding: Proper earthing and bonding are essential for safety. This ensures that in the event of a fault, the fault current is safely directed away from people and property.
Surge Protection: Surge protection devices may be required to protect against voltage surges or lightning strikes, especially for sensitive electronic equipment.
Arc Fault Detection: In certain installations, arc fault detection devices may be used to detect and disconnect circuits in the presence of dangerous arc faults.
Circuit Isolation: BS 7671 also specifies requirements for circuit isolation devices such as switches and isolators.
Cable Sizing: The standard provides guidelines for selecting the correct cable size to ensure that the cables can safely carry the intended load without overheating.
Circuit Labels and Documentation: Proper labeling and documentation of circuits are important for maintenance and safety. BS 7671 outlines requirements for labeling and record-keeping.

It’s important to note that regulations and standards may be updated over time, so it’s essential to consult the latest version of BS 7671 and any local regulations or codes that may apply to your specific location or type of installation. Additionally, electrical work should be carried out by qualified and competent electricians to ensure compliance with safety standards.

Circuit Protection

Circuit Protection by Brand (1496)

EV Circuit Protection (82)

Consumer Units (310)

Three Phase Distribution Boards (106)

Circuit Protection Devices (397)

Electrical Isolators & Switches (110)

Switch Gear & Accessories (200)

Meter Boards & Installation Panels (4)

SPD Surge Protection Devices (109)

Hager PGMF3000 Hi Flex Voltage Supply Cable – 3.0m

Hager PGMFT150 Hi Flex Supply Cable – 0.15m

Hager PGMFT300 Hi Flex Supply Cable – 0.3m

Hager PGMFT500 Hi Flex Meter to Meter Supply Cable – 0.5m

Hager PGMFT1000 Hi Flex Supply Cable – 1.0m

Hager PGMFT1300 Hi Flex Supply Cable – 1.3m

Hager PGMFT2000 Hi Flex Supply Cable – 2.0m

Hager PGMFT3000 Hi Flex Supply Cable – 3.0m

Hager SRA00505 Bar/Cable-Through Current Transformer BG 213 50/5A 1.5VA Class 1

Hager SRA01005 Bar/Cable-Through Current Transformer BG 113 100/5A 2.5VA Class 1

Hager SRA01505 Bar/Cable-Through Current Transformer BG 113 150/5A 2.5VA Class 1

Hager SRA02005 Bar/Cable-Through Current Transformer BG 113 200/5A 2.5VA Class 1

Hager SRA02505 Bar/Cable-Through Current Transformer BG 113 250/5A 2.5VA Class 1

Hager SRC04005 Bar/Cable-Through Current Transformer BG 113 400/5A 5VA Class 1

Hager SRC06005 Bar/Cable-Through Current Transformer BG 113 600/5A 5VA Class 1

Hager SRD08005 Bar/Cable-Through Current Transformer BG 613 800/5A 5VA Class 1

Hager SRD10005 Bar/Cable-Through Current Transformer BG 613 1000/5A 5VA Class 1

Hager SRD15005 Bar/Cable-Through Current Transformer BG 613 1500/5A 5VA Class 1

Hager SRE20005 Bar/Cable-Through Current Transformer

Hager SRI03005 Bar/Cable-Through Current Transformer BG 413 300/5A 5VA Class 1