Only a maintenance free junction box like the wago boxes (sprung loaded connectors and box with strain relief for the cables). Usually it's easy enough if you're under the floorboards to get back to the nearest socket on the ring and wire directly from there using the existing cable to pull another longer one.
Only a maintenance free junction box like the wago boxes (sprung loaded connectors and box with strain relief for the cables). Usually it's easy enough if you're under the floorboards to get back to the nearest socket on the ring and wire directly from there using the existing cable to pull another longer one.