Afternoon All,
Purely a curiosity question this but -
Hager and most other CU manufacturers in the past had a secondary protection device (MCB) upstream of the SPD.
The RCBO board I've bought now takes directly from the 100A incomer and their literature states no upstream protection is required.
Does anyone know what changed from a design perspective to enable this change?
Like I say just curious around what technology has now been integrated into the SPD (if any) that's allowed the removal of this upstream protection.
Cheers
Lee
Purely a curiosity question this but -
Hager and most other CU manufacturers in the past had a secondary protection device (MCB) upstream of the SPD.
The RCBO board I've bought now takes directly from the 100A incomer and their literature states no upstream protection is required.
Does anyone know what changed from a design perspective to enable this change?
Like I say just curious around what technology has now been integrated into the SPD (if any) that's allowed the removal of this upstream protection.
Cheers
Lee