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Do-It-Yourself (DIY) Question & Answer Forum
Peak And Off Peak Submain Isolation
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<blockquote data-quote="D Skelton" data-source="post: 354716" data-attributes="member: 13476"><p>I normally use hi-integrity DBs with a four pole main switch up front for dual tarrif supplies. Dual RCD for normal circuits and a third RCD protecting the off peak circuits. The same principle would apply if I was protecting this as a submain, a four core SWA (armour as the cpc) and a TP switch fuse utilising two of it's fuses. The thing is, both supplies need a single point of isolation really, a TP sw/f kills two birds with one stone as opposed to having a TP isolator and then two SP sw/f.</p></blockquote><p></p>
[QUOTE="D Skelton, post: 354716, member: 13476"] I normally use hi-integrity DBs with a four pole main switch up front for dual tarrif supplies. Dual RCD for normal circuits and a third RCD protecting the off peak circuits. The same principle would apply if I was protecting this as a submain, a four core SWA (armour as the cpc) and a TP switch fuse utilising two of it's fuses. The thing is, both supplies need a single point of isolation really, a TP sw/f kills two birds with one stone as opposed to having a TP isolator and then two SP sw/f. [/QUOTE]
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Peak And Off Peak Submain Isolation
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