Install 6mm 3core SWA into the junction box.
From your consumer unit breaker no.3 install 6mm twin and earth, connect this to the junction box of with the swa.
The sheathing of the swa and the yellow core of the swa should be connected to the earth in the twin and earth cable (the yellow core is now your earth for the man cave).Replace no.3 breaker for a 45 amp breaker.
From your consumer unit breaker no.3 install 6mm twin and earth, connect this to the junction box of with the swa.
The sheathing of the swa and the yellow core of the swa should be connected to the earth in the twin and earth cable (the yellow core is now your earth for the man cave).Replace no.3 breaker for a 45 amp breaker.