OUR PANEL OF EXPERTS
Darren Sweeney Technical Adviser
Keith Hagan Technical Adviser
Neil Sim Technical Adviser
Mark McLaughlin Technical Adviser
Stuart McKelvie Technical Adviser
Q1.9: To overcome thermal insulation
issues, is it permissible to protect a ring fi nal circuit using 2.5 mm2 cable using a 20A protective device? Yes, if the eff ective current carrying capacity of the cable is at least 12.5A (20A × 20/32), so as to eff ectively have the same ‘deemed to comply status’ as Regulation 433.1.204 gives to 30A and 32A ring fi nal circuits. Regulation number(s): 433.1.204. See more at
bit.ly/QAthermal
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and testing of electrical equipment is now available after being released in 2020. What changes have
occurred in this new publication? This was previously covered in detail in the December 2020/January 2021 issue of CABLEtalk. In a nutshell, the main changes are:
● The terms ‘portable’ and ‘moveable’ have been removed
● Table 7.1 has been removed, with more emphasis
I’ve seen that the 5th Edition of the IET’s Code of Practice for in-service inspection
placed on risk assessments for determining the frequency of inspection and testing of electrical equipment
● New terminology is used in product safety standards with new classifi cations of ES1, ES2 and ES3 introduced to replace SELV, ELV and LV. Members requiring any further information should contact the Technical team.
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Installation Certifi cate via SELECTcerts as per BS 7671. However, we currently have to list and append all inspections separately, using a printed and scanned-in version of the model form Annex B on page 113 of the latest Code of Practice (Electric Vehicle Charging Equipment Installation – 4th Edition). Is there any way of incorporating this into SELECTcerts? Electric vehicle charging is classed as a ‘Special Location’ and thus on the inspection schedule supplied with the BS 7671:2018 Electrical Installation
Continued on page 40 >>> CABLEtalk APRIL/MAY 2021 39
During electric vehicle (EV) charger installs, we’re required to fi ll out an Electrical
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