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I can't spot where I'm going wrong, it's RCD protected, I'm going straight down from the socket, and the cables are correctly rated.
Do I need to put some "mechanical protection" over the cable?
Dammit-
rcd protected - good if 30mA
tightly ty-wrapped cables - not good, thermal derating/capacity issue, or cg (grouping factor) to be factored into sizing calc
cable disappearing under worktop and doing a left turn past an appliance generating heat (oven?) - bad, not complying with safe zone concept
loose lead exiting bottom of fused spur to fixed appliance/equipment - not good, poor practice, requires support and protection
is fused spur off the adjacent two x ring sockets? - how have the loading factors for the rings and radials been calculated, if at all?
capping/conduit not mandatory with rcd, but good practice, especially if retrospective access required to cable ways
rive_gauche
have a read of this > http://electrical.theiet.org/wiring-matters/27/cables-in-wall.cfm?type=pdf