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Storage Heaters & Central Heating controls Forum
testing storage heaters
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 20993" data-attributes="member: 250"><p>I would concur with you there Noz...</p><p></p><p>just one minor error in your calc..</p><p></p><p>the 3kw rating value refers to the old money nominal voltage of 240v..</p><p></p><p>if you look at a new one it also states 2.7kw @ 230v</p><p></p><p>(for compliance with our new 'official' nominal voltage of 230v! :| )</p><p></p><p>your calc had a bit of each... so if we just do quick amendment..</p><p></p><p>230v x 230v = 52900 / 2700 = 19.56 ohms</p><p></p><p>but</p><p></p><p>240v x 240v = 57600 / 3000 = 19.2 ohms</p><p></p><p>which is near a need be to Falcon's 20ohms! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /> </p><p></p><p>Many modern electric appliances have a power rating quoted for both 230v &amp; 240v!...</p><p></p><p>e.g. look at a new shower box<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 20993, member: 250"] I would concur with you there Noz... just one minor error in your calc.. the 3kw rating value refers to the old money nominal voltage of 240v.. if you look at a new one it also states 2.7kw @ 230v (for compliance with our new 'official' nominal voltage of 230v! :| ) your calc had a bit of each... so if we just do quick amendment.. 230v x 230v = 52900 / 2700 = 19.56 ohms but 240v x 240v = 57600 / 3000 = 19.2 ohms which is near a need be to Falcon's 20ohms! ;) Many modern electric appliances have a power rating quoted for both 230v & 240v!... e.g. look at a new shower box;) [/QUOTE]
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