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Board upgrade and new feed tails
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<blockquote data-quote="Captain Kirk" data-source="post: 545878" data-attributes="member: 16492"><p>Thanks for pointing out the error. Yes the 15th Edition was introduced in 1981 but did not become enforceable until 1984 in order to allow jobs which been specified and started to be completed to the 14 Ed due to the major changes involved.</p><p></p><p>The street distributor cable has a 400A fuse so the cut out fuse has to protect the meter, the meter tails, and the consumer unit. The plastic cut outs were introduced in 1970 in two basic sizes 80/60A and 100A. At the same time due to metrification the distribution cables were changed to PVC concentric cables with a PVC insulated 25mm solid aluminium phase conductor with bare copper concentric neutral conductors - all covered with PVC sheath overall - this cable had only two or four conductors and was used for PME/MEN supplies only and was rated at 100A. </p><p>For non PME - SEN supplies the cable was split concentric with a PVC insulated 16mm stranded copper phase conductor with 70% insulated concentric copper netral conductors and 30% bare copper earth conductors with PVC sheath overall. These cable were rated at 80A.</p><p>These cable are often confuse with SWA cable due to the concentric conductors</p><p>A 100A cut out may not have a 100 a fuse installed - it could be 80A or 60 A fuse. Obviously as power company employees we would not fit fuses with a higher rating them the meter, tails, or consumer mainswitch and would not connect the installation at all if the consumer unit tails exceeded 3m.</p></blockquote><p></p>
[QUOTE="Captain Kirk, post: 545878, member: 16492"] Thanks for pointing out the error. Yes the 15th Edition was introduced in 1981 but did not become enforceable until 1984 in order to allow jobs which been specified and started to be completed to the 14 Ed due to the major changes involved. The street distributor cable has a 400A fuse so the cut out fuse has to protect the meter, the meter tails, and the consumer unit. The plastic cut outs were introduced in 1970 in two basic sizes 80/60A and 100A. At the same time due to metrification the distribution cables were changed to PVC concentric cables with a PVC insulated 25mm solid aluminium phase conductor with bare copper concentric neutral conductors - all covered with PVC sheath overall - this cable had only two or four conductors and was used for PME/MEN supplies only and was rated at 100A. For non PME - SEN supplies the cable was split concentric with a PVC insulated 16mm stranded copper phase conductor with 70% insulated concentric copper netral conductors and 30% bare copper earth conductors with PVC sheath overall. These cable were rated at 80A. These cable are often confuse with SWA cable due to the concentric conductors A 100A cut out may not have a 100 a fuse installed - it could be 80A or 60 A fuse. Obviously as power company employees we would not fit fuses with a higher rating them the meter, tails, or consumer mainswitch and would not connect the installation at all if the consumer unit tails exceeded 3m. [/QUOTE]
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Board upgrade and new feed tails
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