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Student & Learning Zone - City & Guilds
Voltage Drop
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<blockquote data-quote="binky" data-source="post: 501815" data-attributes="member: 490"><p>1/ as I understand it, voltage drop is from the main incomer, but you will tned to find Zdb is generally very low, so doesn't make that much difference.</p><p></p><p>2/ commercial lighting, like supermarkets, tends to be wired like this. There is also a long protracted argument as to why lighting drops in smaller cables such a s 1mm 3 core is perfectly OK on MCBs such as 16A - short version is that a light of say 100w is never going to overload the 1mm cable, so MCB becomes effectively irrelevent but will still protect against a dead short. </p></blockquote><p></p>
[QUOTE="binky, post: 501815, member: 490"] 1/ as I understand it, voltage drop is from the main incomer, but you will tned to find Zdb is generally very low, so doesn't make that much difference. 2/ commercial lighting, like supermarkets, tends to be wired like this. There is also a long protracted argument as to why lighting drops in smaller cables such a s 1mm 3 core is perfectly OK on MCBs such as 16A - short version is that a light of say 100w is never going to overload the 1mm cable, so MCB becomes effectively irrelevent but will still protect against a dead short. [/QUOTE]
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Voltage Drop
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