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Student & Learning Zone - City & Guilds
3 Phase Design current
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<blockquote data-quote="Legendofzelder" data-source="post: 504330" data-attributes="member: 33364"><p>Hello</p><p></p><p>I’m still at college and learning at the moment so apologies if this question is simple to answer but I’m just second guessing myself </p><p></p><p>part of the design project for my level 3 qualification asks for a cable to be run for swimming pool equipment </p><p></p><p>the specification is:</p><p></p><p>Pool equipment requires a 32A 400V 3 phase supply.(All equipment to be installed by a specialist contractor)</p><p></p><p>Supply using 5 core 70 degree thermo plastic SWA clipped directly </p><p></p><p>Pool Area is at 40 degrees</p><p></p><p>So my understanding is that </p><p></p><p>Ib = 32A</p><p></p><p>Ib = In</p><p></p><p>so In =32A</p><p></p><p>Ca = 0.87 </p><p></p><p>so 32/0.87</p><p></p><p>It = 36.78</p><p></p><p>Reference Method C</p><p></p><p>table 4D4A for cable sizing</p><p></p><p>maximum demand is 96A</p><p></p><p>if I’m wrong I’d like to understand where im wrong my college is very hit and miss at replying atm</p></blockquote><p></p>
[QUOTE="Legendofzelder, post: 504330, member: 33364"] Hello I’m still at college and learning at the moment so apologies if this question is simple to answer but I’m just second guessing myself part of the design project for my level 3 qualification asks for a cable to be run for swimming pool equipment the specification is: Pool equipment requires a 32A 400V 3 phase supply.(All equipment to be installed by a specialist contractor) Supply using 5 core 70 degree thermo plastic SWA clipped directly Pool Area is at 40 degrees So my understanding is that Ib = 32A Ib = In so In =32A Ca = 0.87 so 32/0.87 It = 36.78 Reference Method C table 4D4A for cable sizing maximum demand is 96A if I’m wrong I’d like to understand where im wrong my college is very hit and miss at replying atm [/QUOTE]
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3 Phase Design current
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