Twin & earth

[Jimmyb]

When was 2.5mm T&E with 1.0mm earth last used ?

thanks

 

[Octopus]

Wow, 10 hours and no responses. Our house has 2.5 and 1.0 and is 30 years old - hope this helps.

I'm sure that others can be more precise

 

[telectrix]

1970's at a guess

 

[rodney12]

I was always told late 70s as well