if your going to take a socket from there then you have two things to bear in mind.
1: labeling, make sure its obvious from the fuse box that there is a socket on that circuit.
2: RCD protection, if the socket can "feasiblly supply equipment outside the equipotential zone" (yes i know thats vauge, its the cause of endless arguments among electriciant) then it needs to be RCD protected (either at the CU or using a RCD socket).
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