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Student & Learning Zone - City & Guilds
How Fast Should A Fuse Trip If Cannot Let Go?
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 316729" data-attributes="member: 250"><p>As Andy said fuses &amp; circuit breakers provide overload protection, the typical smallest valued used on the average installation is 6A...</p><p></p><p>So by the time any human body has 6A or more flowing through its vital organs then its pretty much too late...</p><p></p><p>However to reduce the chance of someone touching a metal part that has accidentally become live then the Fuses &amp; Circuit breakers must disconnect in accordance with the times set out in table 41.1, regs 411.3.2, pg 53 when a live part comes into contact with an exposed conductive part... </p><p></p><p>The items that detect shock current are RCD's ..</p><p></p><p>Have a read of 415, where guidance on the recommended disconnection times are given.</p><p></p><p>or</p><p></p><p>section 11 of OSG pages 105 -107 where disconnection times for the various types of RCD are given..</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 316729, member: 250"] As Andy said fuses & circuit breakers provide overload protection, the typical smallest valued used on the average installation is 6A... So by the time any human body has 6A or more flowing through its vital organs then its pretty much too late... However to reduce the chance of someone touching a metal part that has accidentally become live then the Fuses & Circuit breakers must disconnect in accordance with the times set out in table 41.1, regs 411.3.2, pg 53 when a live part comes into contact with an exposed conductive part... The items that detect shock current are RCD's .. Have a read of 415, where guidance on the recommended disconnection times are given. or section 11 of OSG pages 105 -107 where disconnection times for the various types of RCD are given.. [/QUOTE]
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Student & Learning Zone - City & Guilds
How Fast Should A Fuse Trip If Cannot Let Go?
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