<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>David,</DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt">This thread is long and probably still growing and this isn't going to help either...<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt">There are many good suggestions, but here are a few comments on Mobile power.<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>The ground line at the battery should be fused, but at the next higher fuse rating.<SPAN style="mso-spacerun: yes"> </SPAN>The purpose of this fuse is in the event of a battery starter/ground-return fault whereupon some of the ENGINE cranking current flows through your radio ground wire, through the radio and then through the coax shield *if* it is grounded at the antenna.<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>Therefore it should only be done for an individual radio because the coax can't handle the 60 amps required to blow a fuse as suggested in this thread.<SPAN style="mso-spacerun: yes"> </SPAN>Of course, *if* the antenna coax is NOT grounded @ the antenna, as in a mag mount, this "isn't necessary", but if you later change the antenna to a grounded version, you have to remember to go back and fuse the ground line, so doing it up front is better.<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt">So if the radio fuse is 15A then the ground is 20A.<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>Then there is the issue of wire shorts before the radio, say as it goes through the fire-wall.<SPAN style="mso-spacerun: yes"> </SPAN>In this case, a larger fuse would/could be better, but the specifics of this 'whatever' short may not provide high enough current to quickly blow a really large fuse and prevent hi temps even if it s a #10, 8 or larger wire. <SPAN style="mso-spacerun: yes"> </SPAN>With its reasoning, you fuse the wires at the battery and fuse the radio at the radio.<SPAN style="mso-spacerun: yes"> </SPAN><o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>This seems to suggest using the largest wires you can, but the smallest fuses you can.<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"> It probably *is* silly to fuse the ground line in the boom-Boom audio application since there is no antenna coax to help the starter ground cable...(;-)<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>Connecting the ground wire to the chassis/block near (not on) the Battery ground cable to avoid the 'cranking problem' gets around much of this leaving only potential starting transients with a poor battery ground, which is least likely.<SPAN style="mso-spacerun: yes"> </SPAN><o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>For the ground-fault/current/coax reason, for multiple radios it is best to run separate wires from the battery - inconvenient, but "better" technically - or go the frame ground method.<SPAN style="mso-spacerun: yes"> </SPAN>Do whatcha' gotta.<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>Working in the cellular field, we used AMP connectors that actually interface with the PowerPoles, but we used the next size up that are rated for a similar current (45) as the smaller Anderson units.<SPAN style="mso-spacerun: yes"> </SPAN>The first time I saw the ratings for the common (ham) Anderson connectors I couldn't believe it and still don't trust them at 40 amps.<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>SO...<SPAN style="mso-spacerun: yes"> </SPAN>I use the larger size on <SPAN style="mso-spacerun: yes"> </SPAN>#10 wires from the battery then simply make a wire wye adapter between the larger size to the smaller "ham" Anderson size and use the "Ham" Anderson units for each radio to be ARES compatible. <SPAN style="mso-spacerun: yes"> </SPAN>It's really nice to have all radios with the same power connector in the car.<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>With the larger size connector, it is easy to get two or three wires in one contact to make a wire WYE adapter from the large to 1, 2, or 3 "standard" Anderson connectors.<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>I only solder the wires - and it does take some skill not to contaminate the contacts, or over solder the usually stranded wire.<SPAN style="mso-spacerun: yes"> </SPAN>Crimping is fine when done correctly, but it does require the correct, and expensive, crimper. <SPAN style="mso-spacerun: yes"> </SPAN>If not, it causes resistance and therefore heat and some Anderson Power poles have melted, probably for this reason.<SPAN style="mso-spacerun: yes"> </SPAN>A non standard crimper can deform the crimp and essentially destroy it.<SPAN style="mso-spacerun: yes"> </SPAN>I have even seen a crimper suggested that deforms the contact and then it has to be re-formed in another part of the crimper to get it to fit in the housing...YIKES!<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>I recommend first dressing the connectors so there is *NO* stress on them - this is how they were designed to be used.<SPAN style="mso-spacerun: yes"> </SPAN>Then, they should require no mechanical assistance. However, if you want take extra care, put a TieWrap around the WHOLE connector pair - around both backs, between the two wires.<SPAN style="mso-spacerun: yes"> </SPAN>Putting anything through the "hole" stresses the slip-in joint holding the two together--I know the roll-pin is the recommended way, but it does put stress on the slip-joint and folks report they can even fall out.<SPAN style="mso-spacerun: yes"> </SPAN>I've considered putting a 4-40 screw, washers & nut in the hole, but haven't done it.<SPAN style="mso-spacerun: yes"> </SPAN>This
would also facilitate mounting pairs on some type of a panel.<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>All that said, if you take the radio out each night, cycling these connectors many times, screw terminals, such as the black barrier strips or the milky dual set-screw blocks, are a better choice.<SPAN style="mso-spacerun: yes"> </SPAN>These slide together connectors are pretty much a connect-and-leave-alone connector.<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><SPAN style="mso-spacerun: yes"> </SPAN>Finally, if you want a really spiffy looking setup, go to a hi-fi, high power, Boom-Boom mobile audio shop.<SPAN style="mso-spacerun: yes"> </SPAN>They have some really cool looking fuse holders and connection systems that look pretty good to me as far as low resistance goes.<SPAN style="mso-spacerun: yes"> </SPAN>Screw clamping the wires.<SPAN style="mso-spacerun: yes"> </SPAN>They look like there is gold plating and the clear plastic housings yield maximum "spif", not to mention the clear insulation on the wires.<o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt">-- <o:p></o:p></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt">73, Steve, K9DCI</SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt"><o:p></o:p></SPAN> </DIV></td></tr></table>