- Reaction score
- 51
Sorry further on from last post, TNS system, Zs can’t be achieved on final circuits, getting 1.08 Zs on a B63 0.69 but protected by 167 ohms, poor design cable runs are too long and R1+R2 proves this, now I’ve spoke with my boss about what to record in Max Zs is it 0.69 or 167 ohms as all circuits are protected by 300mA RCD, also will MCB trip on overload having not met disconnection times? Sorry this one is confusing me