Would a SPD within a CU at the origin of an installation cover other CU at the origin from surges too? (If the CU with the SPD was the nearest to the mains). What if the CU with the SPD wasn't the closest to the mains? Thanks.
Would a SPD within a CU at the origin of an installation cover other CU at the origin from surges too? (If the CU with the SPD was the nearest to the mains). What if the CU with the SPD wasn't the closest to the mains? Thanks.