BS 7671 Archives

Analysing the installation of cables within containment systems

|Date: 9 July, 2025

Analysing the installation of cables within containment systems

Steve Humphreys, Technical Commercial Manager at NAPIT, analyses the installation of cables within contai ...

Steve Humphreys, Technical Commercial Manager at NAPIT, analyses the installation of cables within containment systems. How often have we lifted a lid off a run of trunking to reveal that it is jam-pa ...

9 July, 2025
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Overcurrent and short-circuit current: how the requirements of BS 7671 are applied

|Date: 19 March, 2025

Overcurrent and short-circuit current: how the requirements of BS 7671 are applied

The aim of this article from the experts at NICEIC is to look at overcurrent; and, in particular, short-c ...

The aim of this article from the experts at NICEIC is to look at overcurrent; and, in particular, short-circuit current, and how the requirements of BS 7671 are applied. The adiabatic equation given i ...

19 March, 2025
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The practice of unfused spurs off a ring final circuit

|Date: 15 January, 2025

The practice of unfused spurs off a ring final circuit

BS 7671 permits an unfused spur (or cable branch) from a 30 A or 32 A ring final circuit supplying access ...

BS 7671 permits an unfused spur (or cable branch) from a 30 A or 32 A ring final circuit supplying accessories conforming to the relevant part(s) of the BS 1363 series to be wired with thermoplastic ( ...

15 January, 2025
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Bonding issues and extraneous-conductive-parts in electrical installations

|Date: 8 January, 2025

Bonding issues and extraneous-conductive-parts in electrical installations

Frank Bertie, Managing Director at NAPIT, discusses bonding issues and extraneous-conductive-parts in ele ...

Frank Bertie, Managing Director at NAPIT, discusses bonding issues and extraneous-conductive-parts in electrical installations. Bonding requirements of BS 7671 Whenever we have discussions, whether re ...

8 January, 2025
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The importance of understanding and applying electrical formula

|Date: 11 December, 2024

The importance of understanding and applying electrical formula

Steve Humphreys, Technical Commercial Manager at NAPIT, stresses the importance of understanding and appl ...

Steve Humphreys, Technical Commercial Manager at NAPIT, stresses the importance of understanding and applying electrical formula. Electrical formulae and its application can be an area that apprentice ...

11 December, 2024
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What constitutes a suitable means of support for wiring systems?

|Date: 22 November, 2024

What constitutes a suitable means of support for wiring systems?

Wiring systems must be selected and erected to avoid during installation, use and maintenance, damage to ...

Wiring systems must be selected and erected to avoid during installation, use and maintenance, damage to the sheath or insulation of cables and their terminations (522.8.1). Jake Green, Head of Techni ...

22 November, 2024
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How are the requirements for overload current in BS 7671 to be applied?

|Date: 30 October, 2024

How are the requirements for overload current in BS 7671 to be applied?

This article from the experts at NICEIC gives an introduction into overload current and how the requireme ...

This article from the experts at NICEIC gives an introduction into overload current and how the requirements for this in BS 7671 are to be applied. It aims to assist contractors to make informed decis ...

30 October, 2024
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RCBO Types and Their Applications

|Date: 16 September, 2024

RCBO Types and Their Applications

Jake Green, Head of Technical Engagement at Scolmore Group, considers some types of RCBOs and their appli ...

Jake Green, Head of Technical Engagement at Scolmore Group, considers some types of RCBOs and their applications, along with the relevant requirements of BS 7671. Residual current operated circuit-bre ...

16 September, 2024
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Test sequence for periodic inspection | NICEIC

|Date: 28 June, 2024

Test sequence for periodic inspection | NICEIC

BS 7671 contains clear requirements in respect of the order in which many tests have to be carried out du ...

BS 7671 contains clear requirements in respect of the order in which many tests have to be carried out during initial verification. However, no such information is given in respect of testing carried ...

28 June, 2024
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Smoke alarm installations: The hidden requirement in BS 7671 | Aico

|Date: 15 May, 2024

Smoke alarm installations: The hidden requirement in BS 7671 | Aico

Michael Coupland of Aico offers advice to ensure you’re not caught off-guard in the future. Even if you’r ...

Michael Coupland of Aico offers advice to ensure you’re not caught off-guard in the future. Even if you’re familiar with BS 7671 and the electrical wiring regulations, you might be missing a crucial d ...

15 May, 2024
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