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6th November 2026

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6th November 2026

EAS requirements are changing – is the electrical sector ready for them?

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Safe isolation: keeping you and other workers safe

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Over 100,000 job and training opportunities a year to give young people a route into Britain’s growth industries

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6th November 2026

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6th November 2026

Low-carbon heating: apprentices see a positive future despite political disagreement on net zero

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28th October 2026

Over 100,000 job and training opportunities a year to give young people a route into Britain’s growth industries

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28th October 2026

Poor pump selection could be undermining household energy savings, Wilo warns

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Upgraded Baxi heating and hot water system help make adapted homecoming possible

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19th August 2026

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30th September 2026

Knowledge check: gas

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30th September 2026

Knowledge check: plumbing

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News | Electrical | Published date: 15 January 2026

RCDs: the what, where, why, when?

Visit the Learning Zone to download our latest technical PDF, RCDs: the what, where, why, when?

Covering:

  • Introduction
  • How does an RCD work?
  • What are the internal parts of an RCD?
  • British Standards
  • When is an RCD used?
  • Protecting people or livestock
  • Protection against fire
  • RCDs for fault protection
  • Selecting the correct RCD – sensitivity
  • Selecting the correct RCD – general or time delayed
  • Selecting the correct RCD – Type
  • Testing RCDs
  • Summary
  • Further reading

This PDF includes six quiz questions and answers on pages 5-6.

Click here to visit the Learning Zone