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Student & Learning Zone - City & Guilds
RCD in series ( Separate from house CU)
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<blockquote data-quote="Traineeboy" data-source="post: 514283" data-attributes="member: 32807"><p>Hi Chaps I Just wanted to check something. If you have an outbuilding that has an RCD board ( 30mA) installed and then it runs back to the house on a main switch RCD (also 30mA) that is connected to a Henley block would this be OK ? I know both might trip but that wouldn't be a issue for discrimination as if the main switch RCD trips it would only trip the outbuilding anyway it's all separate from the house. </p><p></p><p>The RCD main switch at the house is only there as it's touch and go if cable to the shed will meet the 80% rule for Zs. Therefore the outbuilding supply cable being on an RCD would cover this. I know if you were coming off a house main consumer unit would would either fit an RCBO or a time delayed RCD but as discrimination isn't an issue I figure a 30mA at both the house main switch ( separate unit from house CU) and the outbuilding would be OK. </p></blockquote><p></p>
[QUOTE="Traineeboy, post: 514283, member: 32807"] Hi Chaps I Just wanted to check something. If you have an outbuilding that has an RCD board ( 30mA) installed and then it runs back to the house on a main switch RCD (also 30mA) that is connected to a Henley block would this be OK ? I know both might trip but that wouldn't be a issue for discrimination as if the main switch RCD trips it would only trip the outbuilding anyway it's all separate from the house. The RCD main switch at the house is only there as it's touch and go if cable to the shed will meet the 80% rule for Zs. Therefore the outbuilding supply cable being on an RCD would cover this. I know if you were coming off a house main consumer unit would would either fit an RCBO or a time delayed RCD but as discrimination isn't an issue I figure a 30mA at both the house main switch ( separate unit from house CU) and the outbuilding would be OK. [/QUOTE]
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Student & Learning Zone - City & Guilds
RCD in series ( Separate from house CU)
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