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Lighting & Electrical
Why An Open Neutral Kills 120V Devices
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<blockquote data-quote="Emil Gawaziuk" data-source="post: 57392" data-attributes="member: 297"><p>Re: Why An Open Neutral Kills 120V Devices</p><p></p><p>In a 3 wire 240V system, I can see this being a problem (as per the example given in the PDF).</p><p></p><p>One should be more concerned with miswired plugs (hot and neutral reversed. Somewhat common). A 2 wire device such as a laptop power supply or lamp would not be damaged, but a 3 wire device expecting a panel bonded safety ground would get a nice voltage surprise. The more important thing to observe when metering provided outlets or tie ins is voltage difference between the safety ground and neutral (indicating poor panel bonding. Ideally, should read zero volts), and that individual phase to both the ground and neutral is correct.</p><p></p><p>Just a thought.</p></blockquote><p></p>
[QUOTE="Emil Gawaziuk, post: 57392, member: 297"] Re: Why An Open Neutral Kills 120V Devices In a 3 wire 240V system, I can see this being a problem (as per the example given in the PDF). One should be more concerned with miswired plugs (hot and neutral reversed. Somewhat common). A 2 wire device such as a laptop power supply or lamp would not be damaged, but a 3 wire device expecting a panel bonded safety ground would get a nice voltage surprise. The more important thing to observe when metering provided outlets or tie ins is voltage difference between the safety ground and neutral (indicating poor panel bonding. Ideally, should read zero volts), and that individual phase to both the ground and neutral is correct. Just a thought. [/QUOTE]
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Why An Open Neutral Kills 120V Devices
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