I trained as a electrician in the 70s but have long since retired. Just had an EICR test done on my property in advance of selling. I have a 60s Bungalow that originally had wire fuses. I replaced them with MCBs 10 years ago. Assessor gave me a C3, is that reasonable? I got a C3 on the Lighting circuits due to no earth and a class 1 appliance. If I change it to a class 2 appliance should that become a C3?
 
I think the tester was quite lenient, class 1 fitting on a lighting circuit with no cpc would be a C2 . Even if you changed to class 2 it would still attract C3 All lighting circuits should be earthed.
I did get a C3 on the light. It seems many properties in the 60s had no earth in the lighting circuits!
 
My understanding is that upgrading is not a requirement and that provided class 2 appliances used it should be a C3.

No, double or reinforced insulation is only permitted as a protective measure when the installation is under the supervision of an electrically competent person.
This is not applicable to a domestic installation.
 
The lack of CPC in pre-1966 light circuits is something that comes up from time to time and really the answer is a rewire to fix that and of course that the cable must be over 57 years old now. If you want to read up on the industry guidance then the Best Practice Guide #1 (covers this situation when doing a CU change) and #4 (suggests coding as C2 for any class I accessories, and C3 for class II, but that is lenient as the regs only allow that for supervised situations) are worth looking at, available for free here:

https://www.----------------------------/professional-resources/best-practice-guides/
 
The lack of CPC in pre-1966 light circuits is something that comes up from time to time and really the answer is a rewire to fix that and of course that the cable must be over 57 years old now. If you want to read up on the industry guidance then the Best Practice Guide #1 (covers this situation when doing a CU change) and #4 (suggests coding as C2 for any class I accessories, and C3 for class II, but that is lenient as the regs only allow that for supervised situations) are worth looking at, available for free here:

https://www.----------------------------/professional-resources/best-practice-guides/
Thanks for this, one question ‘What are supervised situations’?
 
Thanks for this, one question ‘What are supervised situations’?
Ones where any changes are made by an electrically qualified person. Houses often have DIY changes to light switches and lights so you can't expect them to grasp the lack of CPC and need for it with Class I accessories.
 
Last edited by a moderator:
My last sentence seems to read wrongly but the meaning should be CPC needed with class I, lack of CPC is only acceptable for class II (double insulated).

There can be alternatives to rewiring such as running in a separate CPC from a nearby circuit, but that is often as difficult as the rewiring aspect. Also assuming there is no metal conduit in use?
 

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EICR Inspection Issue
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Periodic Inspection Reporting & Certification
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