The BS rating for a socket (twin, single or whatever) is 13A, the type test for a twin is 14A + 6A, if a manufacturer decides to design and test a twin socket that they additionally test to draw 45.951749 amps for 10 years with no apparent damage well all well and good if they want to do that.
If you run an unfused spur from a ring or radial circuit then that spur should pass the current safely, if less than 2.5 csa then it must be "fused down" or some other effective means of limiting current for A/ Overload, B/ Short Circuit, C/ Earth Fault.
A/ Overload is achievable by just having one single socket if that is the way you choose to satisfy that particular requirement.
B/ Short Circuit - We could conspire to put a big resistance (Impedance) in circuit to satisfy the removal of this risk if we wish too. It would be a barmy way to approach the problem though in my humble opinion.
C/ Earth fault - well on a TT system we might have no choice than needing to rely on RCDs but with earthy supplies such as TNS or TNC-S we usually consider the RCD as a secondary or back up protection to good earthing principles anyway.
Actually ref putting a "big resistance" in series to remove a problem I did once, years ago, use that on a Burglar Alarm System - The control panel needed changing and there was a 12v Carters Minimite as the internal sounder, the new control panel was an a & G BS80/2 (anybody remember them?) and the F1A kept blowing as soon as it tried to sound because the sounder was basically motor driven and the initial surge took the fuse out.
A 15ohm resistor (Around 20W rating if I remember correctly) solved the problem because it limited the current to about 1A at surge and made very little discernible difference to the sounder effect after a very few seconds for the motor to reach speed.
If you run an unfused spur from a ring or radial circuit then that spur should pass the current safely, if less than 2.5 csa then it must be "fused down" or some other effective means of limiting current for A/ Overload, B/ Short Circuit, C/ Earth Fault.
A/ Overload is achievable by just having one single socket if that is the way you choose to satisfy that particular requirement.
B/ Short Circuit - We could conspire to put a big resistance (Impedance) in circuit to satisfy the removal of this risk if we wish too. It would be a barmy way to approach the problem though in my humble opinion.
C/ Earth fault - well on a TT system we might have no choice than needing to rely on RCDs but with earthy supplies such as TNS or TNC-S we usually consider the RCD as a secondary or back up protection to good earthing principles anyway.
Actually ref putting a "big resistance" in series to remove a problem I did once, years ago, use that on a Burglar Alarm System - The control panel needed changing and there was a 12v Carters Minimite as the internal sounder, the new control panel was an a & G BS80/2 (anybody remember them?) and the F1A kept blowing as soon as it tried to sound because the sounder was basically motor driven and the initial surge took the fuse out.
A 15ohm resistor (Around 20W rating if I remember correctly) solved the problem because it limited the current to about 1A at surge and made very little discernible difference to the sounder effect after a very few seconds for the motor to reach speed.
