17th Edition Wiring Regulations Amendment 3: What’s Changing?

With some major changes coming to the 17th Edition Wiring Regulations from Amendment 3, due to be announced on 1st November,  what will this mean for those of us already in the industry?

Electrical Training Course News Article 110Well, until the final details of these changes are announced in a few weeks time, we can only speculate as to what might be included. However, the proposed changes, which were announced last year, are available and may offer a clue as to what could be included with this update.

Undoubtedly these changes will mean new training workshops will be need to be taken by those working to 17th Edition standards, to ensure all work continues to current standards.

While we are all eagerly anticipating the release of amendment 3, let’s take a look at some of the potential changes to the current 17th Edition Regulations.

Part 2 Definitions -This section could be expanded and modified with some of the terminology changing to avoid confusion and promote further clarity.

Chapter 52 Selection and Erection of the Wiring Cables: Cables concealed in a wall or partition -This section could be rewritten and all references to the phrase ‘under the supervision of skilled and instructed persons’ may be removed.

Section 557 Auxiliary Circuits – This section is a proposed new addition to the regulations and will cover things like auxiliary circuits for low voltage electrical installations. These types of circuits are for the transmission of signals intended for the detection, supervision or control of the functional status of a main circuit.

Section 717 Mobile and Transportable Units – This covers units which are self propelled, towed or transportable containers or cabins. Risk reduction requirements include automatic disconnection by RCD, accessible conductive parts to be connected through equipotential bonding to the main earth terminal within the unit, and the type of supply, voltage rating, number of phases, on board earthing and maximum power required.

Section 559, 714 and 715: Luminaires and Lighting Installations – Changes are proposed to bring this section together with the latest IEC and CENELEC standards.

Section 715 Extra-low Voltage Lighting – This refers to installations supplied from sources with maximum rated voltage of 50Vac rms or 120Vdc. Changes are expected to go along with the latest IEC and CENELEC standards.

Section 714 Outdoor Lighting Installations – Only minor changes are proposed in this section including things like requiring individual circuits to be isolated.

Chapter 41 Protection against Electric Shock – It is proposed that any reference to ‘ordinary persons’ is removed and protection for socket outlets up to 20A for all installations is required. However, those with RCD protection for specific labelled socket outlets or where a risk assessment has decided that RCD protection is not necessary are exempt.

‘Cmin’ Factor – It is proposed that the maximum earth fault loop impedance is revised to account for the Cmin factor. Notes on the tables will be changed to reflect maximum permitted operating temperature.

Chapter 42 Protection against Thermal Effects – Regulation 421.1200 requires switchgear assemblies including consumer units to have their enclosure manufactured from non combustible material to help protect against fire.

Condition Report – A few changes are proposed to the electrical installation condition report and notes. It proposes changes to the certification of new work – the schedule of inspections for new work to be replaced by examples of items that require inspection during initial verification.

There may be some other changes included in amendment 3 not listed here and some of those here may not be included in the final publication. We won’t know for certain until the details are published in November.

In the meantime, if you are interested in updating your skills to incorporate the new amendment 3, let us know and we’ll publish details of our course as soon as it’s available.

Written by Sara Thomson

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Ticking all the Boxes for Competent Persons


Steve Rae-Jones: “Not everything has to be notified to LABC.”

Back in April, we reported how Steve Rae-Jones had squared up to City & Guilds 2394 exam to bring his qualifications up to date, as a returning trade electrician. That stage marked the first of three along the way to full Competent Person certification, and Steve has now passed all the exams including City & Guilds 2395 and City & Guilds 2382 17th Edition.

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Solar Panel Installer breaks Back in 6m Fall

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Accredited solar installer training includes safe working awareness 

A solar panel installation firm and its technical director have been prosecuted after an employee broke his back when he fell six metres through the roof light of a barn in Northamptonshire.

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Electrical Safety First voices ‘Grave Concerns’ over Third Party Inspection Scheme

A way for DIYers to have their work checked and certified?

Just over a year ago, we posted a blog entry at Tester.co.uk about the Surge In Brits Carrying Out DIY Electrical Work according to survey carried out by the Electrical Safety Council (ESC), now renamed Electrical Safety First. ESC had found that one in seven Brits had tried to rewire their homes, one in five had changed fuse boxes, one in six had attempted an electrical installation in the garden and one in eight had even tried to install electrical components under floor areas in their home.

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Squaring up to City & Guilds 2394

Steve Rae-Jones small

Steve Rae-Jones: “I have never been one for exams.”

The pass rate for City & Guilds 2394-302 Level 3 Principles, Practices and Legislation for the Initial Verification of Electrical Installations examination, which currently hovers around 50%, has hit a high of 62% and a low of 34% between 2012 and 2013. This means that almost two-thirds at one time failed the exam, so in the case of Steve Rae-Jones, passing first time round was a cause for celebration.

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