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Student & Learning Zone - City & Guilds
Can you please check my cable calculation.
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<blockquote data-quote="L Plate" data-source="post: 162715" data-attributes="member: 3979"><p>edited new calculation in the shed.</p><p></p><p>from the info of PC that the large flymo has only 1500w ( 1.5kw ) but to make sure , just incase I will have 2kw for the flymo mower max.</p><p></p><p>So, 2000/230 = 8.6V ( 9v rounded )</p><p></p><p>therefore demand for the shed</p><p></p><p>9v for the mower</p><p></p><p>6v for the lightings</p><p></p><p>so total demand is 15A</p><p></p><p>Ib=15A</p><p></p><p>In=20A</p><p></p><p>Ca= 0.89 ( IEE page 267 table 4B2 @ insulation 70C thermoplastic )</p><p></p><p>It= 20</p><p></p><p>------ = 22.5A</p><p></p><p>0.89</p><p></p><p>Vd = 15x40.5x20</p><p></p><p>_________ = 12.15 A</p><p></p><p>1000</p><p></p><p>this is the 2.5mm 3 core armoured cable but the Vd for this is to high.</p><p></p><p>therefore</p><p></p><p>for 4mm 3 core armoured cable</p><p></p><p>Vd= 9.5x40.5x20</p><p></p><p>___________= 7.7V</p><p></p><p>1000</p><p></p><p>so therefore I will use 4.0mm 3 core armoured cable to supply the shed.</p><p></p><p>Can anyone check it again pls</p><p></p><p>thanks all</p><p></p><p>Good evening</p><p></p><p>Lplate</p></blockquote><p></p>
[QUOTE="L Plate, post: 162715, member: 3979"] edited new calculation in the shed. from the info of PC that the large flymo has only 1500w ( 1.5kw ) but to make sure , just incase I will have 2kw for the flymo mower max. So, 2000/230 = 8.6V ( 9v rounded ) therefore demand for the shed 9v for the mower 6v for the lightings so total demand is 15A Ib=15A In=20A Ca= 0.89 ( IEE page 267 table 4B2 @ insulation 70C thermoplastic ) It= 20 ------ = 22.5A 0.89 Vd = 15x40.5x20 _________ = 12.15 A 1000 this is the 2.5mm 3 core armoured cable but the Vd for this is to high. therefore for 4mm 3 core armoured cable Vd= 9.5x40.5x20 ___________= 7.7V 1000 so therefore I will use 4.0mm 3 core armoured cable to supply the shed. Can anyone check it again pls thanks all Good evening Lplate [/QUOTE]
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Student & Learning Zone - City & Guilds
Can you please check my cable calculation.
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