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Do-It-Yourself (DIY) Question & Answer Forum
3 phase arcing
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<blockquote data-quote="Tony S" data-source="post: 480571" data-attributes="member: 20864"><p>The 20V across a fuse isn’t normal but not unknown. In the event of a short circuit the three supply fuses will clear the fault but fuses aren’t an exact science. Two fuses may blow, the third doesn’t see the full effect of the fault and makes a half hearted attempt but won’t fully blow clear. This makes them dangerous.</p><p></p><p>If two fuses blow always replace all three as the third fuse has been stressed and will fail in time.</p></blockquote><p></p>
[QUOTE="Tony S, post: 480571, member: 20864"] The 20V across a fuse isn’t normal but not unknown. In the event of a short circuit the three supply fuses will clear the fault but fuses aren’t an exact science. Two fuses may blow, the third doesn’t see the full effect of the fault and makes a half hearted attempt but won’t fully blow clear. This makes them dangerous. If two fuses blow always replace all three as the third fuse has been stressed and will fail in time. [/QUOTE]
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3 phase arcing
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