A truly single socket will be OK, a single spur to a double socket may not be. I'd be less worried about a fused spur as there is less risk of unfused 2 way adaptors and a change to a double socket later.

But the whole point of the one reel of 2.5mm and no thought it is indeed the lack of thought, One could make an optimum ring thicker near the CU and thinner at the far point, but we don't.

Mike.

I agree. While it may not conform to the stipulations of Appendix 15, I don’t perceive any safety concerns. Additionally, according to table 4D5, a clipped direct 1.5mm cable is capable of handling 20 Amps.

mapj1 said:

A truly single socket will be OK,

Provided the length of the spur < 3 m ? (If you are referring to downstream device providing protection against overcurrent), AND adiabatic met for both L-N and L-PE faults.

HOWEVER

THe problem with socket-outlets, some would argue, is that there is no protection against the use of multiway extension leads permitting long-term moderate overload currents that might damage equipment, but not operate the OCPD ... if you subscribe to that chain of thought ... NO, it's a straight non-conformity with BS 7671

mapj1 said:

A truly single socket will be OK,

Provided the length of the spur < 3 m ? (If you are referring to downstream device providing protection against overcurrent), AND adiabatic met for both L-N and L-PE faults.

HOWEVER

THe problem with socket-outlets, some would argue, is that there is no protection against the use of multiway extension leads permitting long-term moderate overload currents that might damage equipment, but not operate the OCPD ... if you subscribe to that chain of thought ... NO, it's a straight non-conformity with BS 7671