SUMMER HOUSE EARTHING

[NEBITOMI]

HELLO
I would like to know if i install summer house ,then i would put earth spike next to the house!
in this case can i use the main supply earthing (tn-s or tncs) to connected to summer house fuseboard?
if i put earth rod then can i connect that earth tail to the summer house fuseboard aslo?
so in the summer house fuseboard would be 2 earth cable, one from the house and one from the earth rod!im right if i do this? or only just one earth cable must be connect in the fuseboard?!
please advice to me !
thx

 

[cliffed]

If no Main water/gas/steel structure you can use the main earth from the house.If these are present ,cpc/ main bonding conductor to summer house,will be the same as house supply.
Tt system may be better,Swa & relevant cpc.