Replacement of CU in TT system

[austin]

Hi Guys

i am about to change a CU on a TT system. IT has re-wireable fuses and is fed from a 100mA RCD (pretty standard) I am planning to change it for a split 30mA rcd board. Can I leave the 100mA rcd in place and use it like an isolation switch for the CU or will it cause problems.

Cheers

 

[Risteard]

Hi Guys

i am about to change a CU on a TT system. IT has re-wireable fuses and is fed from a 100mA RCD (pretty standard) I am planning to change it for a split 30mA rcd board. Can I leave the 100mA rcd in place and use it like an isolation switch for the CU or will it cause problems.

Cheers

Replace it with an S-type for discrimination.

 

[pushrod]

Would have thought it would be better and cheaper to just replace it with a proper isolator.