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Student & Learning Zone - City & Guilds
Testing a TT System max ZS
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<blockquote data-quote="Traineeboy" data-source="post: 502644" data-attributes="member: 32807"><p>To put this into wider context </p><p></p><p>We have a job coming up for a TT system and want to get my head round it. This is what I think should be the setup, am I missing anything ? </p><p></p><p>A Main switch fused to protect cable at the Origin of supply then 2 core SWA to an outbuilding. Note that the steel wire will be glanded at the supply end but not at the outbuilding end. The outbuilding is about 70 meters away from the supply so a 35mm2 is Being used to allow for volt drop. </p><p></p><p>The SWA L and N conductors will go straight into a built in SPD in consumer unit in the outbuilding then to the main switch. The conductors will be via an SWA and clamped so no need for an upfront RCD. The board will be a duel RCD board and all circuits will be RCD protected. Thoughts ? </p></blockquote><p></p>
[QUOTE="Traineeboy, post: 502644, member: 32807"] To put this into wider context We have a job coming up for a TT system and want to get my head round it. This is what I think should be the setup, am I missing anything ? A Main switch fused to protect cable at the Origin of supply then 2 core SWA to an outbuilding. Note that the steel wire will be glanded at the supply end but not at the outbuilding end. The outbuilding is about 70 meters away from the supply so a 35mm2 is Being used to allow for volt drop. The SWA L and N conductors will go straight into a built in SPD in consumer unit in the outbuilding then to the main switch. The conductors will be via an SWA and clamped so no need for an upfront RCD. The board will be a duel RCD board and all circuits will be RCD protected. Thoughts ? [/QUOTE]
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Testing a TT System max ZS
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