Amendment 3

Problems of Metal Consumer Unit on TT Supply- Video

22 April 2015

Here’s a very informative video from John Ward about the problems of installing a metal consumer unit on a TT supply. The problem Should a fault occur between line and earth on the supply side of a TT system, due to the high earth loop impedance (resistance back to the supply transformer) it will not cause a high enough current […]

Read the full article →

New Reg 421.1.201- Metal Consumer Units

30 October 2014

This post highlights some of the main points and concerns regarding the 17th Edition  Amendment 3 reg 421.1.201 about the use of metal consumer units (non-combustible enclosures). Picture of fire damage caused by loose wiring connections. Fire Brigade Lobbying The London Fire Brigade consider consumer units in domestic installations to be a high fire risk as the […]

Read the full article →

17th- Amendment 3 The Changes Update

25 October 2014

This post updated June 2015. The 3rd amendment to the 17th edition of the wiring regulations BS7671 was published in January 2015 and any installations designed after June 2015 must comply. Check out price to buy at Amazon BS7671 Amendment 3. Make sure you order the new yellow book and not the Amd 2 green […]

Read the full article →

Tech Talks on BS7671 Amendment 3, Emergency Lighting Regs

7 August 2014

TechTalks for electricians are back for an exciting new series packed with first-class exhibitors, innovative products and plenty of technical advice! Join the team at a venue near you for a memorable morning where electricians can get up-to-speed on all of the latest updates in the industry. NICEIC & ELECSA’s Tony Cable and Darren Staniforth […]

Read the full article →