Question on voltage drop and cable size, if your cable run exceeds the allowed length you would use a larger size cable is this correct ,for example on a lighting circuit using a 6 amp fuse or mcb what is the max size cable you could use using the same 6 amp fuse or mcb to overcome the volt drop problem.On a radial circuit using a 15 amp or 20 amp fuse or mcb what max size cable could you use to over come the voltage dropusing the same fuses or mcb 15 amp or 20 amp.On a ring circuit using a 32 amp fuse or mcb what would the max size cable you could use still using the 32 amp fuse or mcb to overcome voltage drop thanks.