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<blockquote data-quote="binky" data-source="post: 497438" data-attributes="member: 490"><p>OK, with TN-S you can export the earth, so no need ot TT any part of the ysstem, although some on here would rather do it that way . Sub mains don't need RCD protection, but abvioulsy RCBO every other cct to compky with todays regs. </p><p></p><p>I'm a bit of a fan of 2 core swa and usuing armour for earthing, however, 3 core cable tends to be cheaper these days as there is little demand for 2 core.</p></blockquote><p></p>
[QUOTE="binky, post: 497438, member: 490"] OK, with TN-S you can export the earth, so no need ot TT any part of the ysstem, although some on here would rather do it that way . Sub mains don't need RCD protection, but abvioulsy RCBO every other cct to compky with todays regs. I'm a bit of a fan of 2 core swa and usuing armour for earthing, however, 3 core cable tends to be cheaper these days as there is little demand for 2 core. [/QUOTE]
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