Knowledge Hub

Compare consumer unit protection options and understand the differences between grouped RCD protection, individual RCBOs and arc-fault detection.

Learn how equipment condition, existing protection and planned electrical changes help determine whether a consumer unit upgrade is appropriate.

Understand the stages of a consumer unit replacement, from assessing the installation and agreeing protection options to testing and certification.

Find out what an electrical safety inspection involves, how to prepare and what to expect from the report and recommendations.

Understand the classifications on an electrical inspection report and how they explain the priority of repairs, improvements or further investigation.

Learn how property use, installation condition and previous findings influence when to arrange your next electrical safety inspection.

Explore the warning signs that deserve investigation and understand why an assessment should guide decisions about replacing your home’s wiring.

Compare full and partial rewiring, including the work involved, retained wiring and the factors that determine the appropriate scope.

View Spark’s indicative rewiring prices and understand how property layout, access and electrical requirements affect the final quotation.

Understand possible reasons for recurring tripping, why investigation matters and what information can help an electrician identify the cause.

Explore problems that can develop in older installations and learn why their condition matters more than the property’s age alone.

Recognise signs of damaged electrical accessories and understand why the underlying cause should be assessed before replacement.