The type 1 SPD at source really only applies to LPS-equipped systems or ones with long overhead feed cables. Having a type 2 device is fine, so long as it is rated for the matching OCPD (if that is DNO fuse or separate MCB)
I suspect the NIC inspector is just following the "no mixed manufacture" aspect to the letter, which is kind of irrelevant for the outside DIN enclosure. But more importantly if the company making them certifies they are suitable for any CU subject to the matching MCB brand being used then they are taking responsibility for the overall design and you don't have to.
I suspect the NIC inspector is just following the "no mixed manufacture" aspect to the letter, which is kind of irrelevant for the outside DIN enclosure. But more importantly if the company making them certifies they are suitable for any CU subject to the matching MCB brand being used then they are taking responsibility for the overall design and you don't have to.
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