RCCB on a TT installation ??

[Golden_Boy]

With a 17th edition CU is it still a requirement to have a 100 ma RCCB as an isolator on a TT ?

 

[Guest123]

Hi.

No. Unless it's a metalclad CU then you would need to protect the meter tails with a 100mA S type.

 

[Golden_Boy]

Hi.

No. Unless it's a metalclad CU then you would need to protect the meter tails with a 100mA S type.

Thanks for the info. Its a wylex plastic one.......