- Reaction score
- 2,068
When a sub-distribution board is located more than 10m away from the mains SPD, additional SPDs are required.In my opinion if you have distribution boards downstream a reasonable distance from the other distribution boards then these really should have their own SPD as well. One at the origin won't cut it.
Both his consumer units are close together.
It leaves the question of does the garage need one.
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