RING FINAL CIRCUIT ARRANGEMENTS, REGULATION 433.1.5
The load current in any part of the circuit should be unlikely to exceed for long periods the current-carrying capacity of the cable
(Regulation 433.1.5 refers). This can generally be achieved by:
(i) locating socket-outlets to provide reasonable sharing of the load around the ring
(ii) not supplying immersion heaters, comprehensive electric space heating or loads of a similar profile from the ring circuit
(iii) connecting cookers, ovens and hobs with a rated power exceeding 2 kW on their own dedicated radial circuit
(iv) taking account of the total floor area being served. (Historically, a limit of 100 m2 has been adopted.)