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FJR Motorcycle Forums
Technical & Mechanical Problems
FJR Headlight problem possibly dimmer relay
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<blockquote data-quote="mcatrophy" data-source="post: 1347661" data-attributes="member: 3187"><p>Ken - I don't want to get into a p*ss*ng match, you Aussies are so much better than we Poms at that, as well as at cricket and rugby. Let's just look at the figures.</p><p></p><p>As a comparison, copper has a resistivity of 1.59 x 10-6 ohm/cm (I had to go back to my 1966 Collin's Radio Diary to get this in cgs units!). Your grease is approximately 10000 times more resistive than my copper. There is no way that can affect the conductivity of a connector.</p><p>A ball-park calculation - let's assume we have a connector surface area say 1mm wide, 2 mm long. Let's put in a layer of your grease that's 0.01mm thick (I can't imagine any thinner). Its resistance would be 115 x 0.001 / (0.1 x 0.2) ohms. That's 5.75 ohms. That's not going to help a circuit carrying even 1 amp (5.75 volt drop, 5.75 watts heat dissipation).</p><p></p><p>As I said, the idea of "conductive" grease being <strong>superior</strong> to a "dielectric" grease in a power circuit is a myth. Nothing wrong with using it, simply no advantage.</p><p></p><p>Oh, yes, your diagram is the bee's knees. Luckily I never suffered from spider bites on my Gen 2 bikes, but that would have been a god-send if I had been unlucky.</p></blockquote><p></p>
[QUOTE="mcatrophy, post: 1347661, member: 3187"] Ken - I don't want to get into a p*ss*ng match, you Aussies are so much better than we Poms at that, as well as at cricket and rugby. Let's just look at the figures. As a comparison, copper has a resistivity of 1.59 x 10-6 ohm/cm (I had to go back to my 1966 Collin's Radio Diary to get this in cgs units!). Your grease is approximately 10000 times more resistive than my copper. There is no way that can affect the conductivity of a connector. A ball-park calculation - let's assume we have a connector surface area say 1mm wide, 2 mm long. Let's put in a layer of your grease that's 0.01mm thick (I can't imagine any thinner). Its resistance would be 115 x 0.001 / (0.1 x 0.2) ohms. That's 5.75 ohms. That's not going to help a circuit carrying even 1 amp (5.75 volt drop, 5.75 watts heat dissipation). As I said, the idea of "conductive" grease being [B]superior[/B] to a "dielectric" grease in a power circuit is a myth. Nothing wrong with using it, simply no advantage. Oh, yes, your diagram is the bee's knees. Luckily I never suffered from spider bites on my Gen 2 bikes, but that would have been a god-send if I had been unlucky. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
FJR Headlight problem possibly dimmer relay
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