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Do-It-Yourself (DIY) Question & Answer Forum
Changes to reg 411.3.3 PEN Conductor.
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<blockquote data-quote="lav89" data-source="post: 488021" data-attributes="member: 31934"><p>Hi, this is my first post, and I hope it doesn't come across as a stupid one.</p><p></p><p>I am a qualified spark who primarily works on subsea equipment on vessels, thus the 17th and 18th edition regs are not really required for what I do.</p><p></p><p>However, I do always keep myself updated with the current regs for when I do work at home. </p><p></p><p>My question, I have read one of the changes is regulation 411.4.3 has been modified to include that no switching or isolating device shall be inserted in a PEN conductor.</p><p></p><p>My understanding was that on said systems, if for example you were moving a fuseboard and the tails were to be over 3metres long you would install a switched fuse unit to protect the cables, how are we now supposed to protect said cable without installing such devices. I do understand the logic of it though ( I THINK!) , the concern is that should the device that's protecting the meter tails become faulty and somehow manage to lose the PME to the fuseboard you would then have a broken PME and be in trouble. Also then, what about the double pole isolators that the DNOs fit , does this class as an isolator on the PEN conductor?</p><p></p><p>I hope I have read it right and don't look a complete donkey haha! Its just one of the changes that stood out to me when ive just read them.</p><p></p><p>Thanks</p></blockquote><p></p>
[QUOTE="lav89, post: 488021, member: 31934"] Hi, this is my first post, and I hope it doesn't come across as a stupid one. I am a qualified spark who primarily works on subsea equipment on vessels, thus the 17th and 18th edition regs are not really required for what I do. However, I do always keep myself updated with the current regs for when I do work at home. My question, I have read one of the changes is regulation 411.4.3 has been modified to include that no switching or isolating device shall be inserted in a PEN conductor. My understanding was that on said systems, if for example you were moving a fuseboard and the tails were to be over 3metres long you would install a switched fuse unit to protect the cables, how are we now supposed to protect said cable without installing such devices. I do understand the logic of it though ( I THINK!) , the concern is that should the device that's protecting the meter tails become faulty and somehow manage to lose the PME to the fuseboard you would then have a broken PME and be in trouble. Also then, what about the double pole isolators that the DNOs fit , does this class as an isolator on the PEN conductor? I hope I have read it right and don't look a complete donkey haha! Its just one of the changes that stood out to me when ive just read them. Thanks [/QUOTE]
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Changes to reg 411.3.3 PEN Conductor.
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