OSG Pg.40 says:
'[Split CU with 2x RCCBs] is not suitable for an installation forming part of a TT system as there is insufficient fault protection of the single-insulated conductors that connect the load side of the double-pole main switch to the supply-side of the RCCB's.'
Why is there insufficient fault protection here?
I've seen loads of TT systems with RCD protection in them. What would you use instead? I know you can use RCBO's but they're not standard.
'[Split CU with 2x RCCBs] is not suitable for an installation forming part of a TT system as there is insufficient fault protection of the single-insulated conductors that connect the load side of the double-pole main switch to the supply-side of the RCCB's.'
Why is there insufficient fault protection here?
I've seen loads of TT systems with RCD protection in them. What would you use instead? I know you can use RCBO's but they're not standard.