daleheywoodtanks Posted March 2, 2015 Share Posted March 2, 2015 These seem to work well for us if you put them on top of battery cover. batteries to the switch, then on to vehicle. Seems to isolate everything, even if you still have the fuse 'in' for the firewire you do need to paint them off course ! Quote Link to comment Share on other sites More sharing options...
daleheywoodtanks Posted March 2, 2015 Share Posted March 2, 2015 or maybe a pair of these would do the same job, just a bit more of a fiddle if your batteries are covered. http://www.ebay.co.uk/itm/400809736082?_trksid=p2055119.m1438.l2648&ssPageName=STRK%3AMEBIDX%3AIT Quote Link to comment Share on other sites More sharing options...
robin craig Posted March 3, 2015 Share Posted March 3, 2015 Dear Nick and others, Thank you for your replies. My intention is to modify my Land Rover 1 Tonne Forward Control in the following manner. The basic intent is to enable:- 1 allow quick disconnect trickle charging 2 battery master switch 3 inter vehicle slave socket The following functions were not part of the original build specs. As I am somewhat of a rivet counting purist I do not want to deface the vehicle, so my credo of "no new holes, nothing welded on" has to be respected. The only way I can do this is to remove the original battery box lid and preserve it and fabricate a new one using the same securing method of zeus fasteners. The new lid will look like it was meant to be there but have those three facilities included. Thanks for the tip Nick Robin Quote Link to comment Share on other sites More sharing options...
fesm_ndt Posted March 3, 2015 Share Posted March 3, 2015 Technically, charge flows from negative (cathode) to positive (anode), so removing the negative removes the source of energy. This might be the cause of all the confusion. Not Lauren's comment Positive to negative is current flow Negative to positive is electron flow (electrons, being negatively charged, flow in the opposite direction to the direction of conventional current flow in an electrical circuit) Pretty sure the sparkies didn't figure out electron flow until mid 20th centuary. Kinda makes you wonder how everything worked when the original concept was wrong. This is why we have a left hand and right rule for the magnetic field direction. All in all a quirk of electrical history Quote Link to comment Share on other sites More sharing options...
woodsmoke7 Posted March 3, 2015 Share Posted March 3, 2015 http://www.ebay.co.uk/itm/NOS-Military-Land-Rover-90-110-Wolf-Interstart-Plug-24-volt-RRC8692-/251841590103?pt=LH_DefaultDomain_3&hash=item3aa2edb357 bit cheaper Are the jump start cables readily avalible in this guise? Quote Link to comment Share on other sites More sharing options...
andym Posted March 3, 2015 Share Posted March 3, 2015 Are the jump start cables readily avalible in this guise? Just a standard interstart cable, methinks? Andy Quote Link to comment Share on other sites More sharing options...
Lauren Child Posted March 3, 2015 Share Posted March 3, 2015 This might be the cause of all the confusion. Not Lauren's comment Positive to negative is current flow Negative to positive is electron flow (electrons, being negatively charged, flow in the opposite direction to the direction of conventional current flow in an electrical circuit) Pretty sure the sparkies didn't figure out electron flow until mid 20th centuary. Kinda makes you wonder how everything worked when the original concept was wrong. This is why we have a left hand and right rule for the magnetic field direction. All in all a quirk of electrical history I was told that it was a mistake when the concept of current was first presented to the scientific community. The polarity was wrong, and so current ended up being shown backwards. As that's the way the community understood it, it stuck even when the mistake was realised. The important thing to remember is that the active terminal is opposite to what you expect. What's now thought of as current is actually the continual freeing up of electron holes that have been vacated by an electron moving the opposite way, allowing another electron to move in. This is probably getting a bit heavy for a thread on battery isolators though Quote Link to comment Share on other sites More sharing options...
Lauren Child Posted March 3, 2015 Share Posted March 3, 2015 The other thing about isolators is to get one with an adequate capacity. Having had one melt, I'd just like to echo this comment. Check the current ratings against what you expect it to draw (sorry, I don't know the rating you need, but I'm sure someone on here will) Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted March 3, 2015 Share Posted March 3, 2015 Are the jump start cables readily avalible in this guise? This is the standard socket for British army vehicles since the 50's so you should be able to pick up a lead or at last a couple of plugs to make your own. Often seen on stalls at W&P and the like. Quote Link to comment Share on other sites More sharing options...
andym Posted March 4, 2015 Share Posted March 4, 2015 This is probably getting a bit heavy for a thread on battery isolators though And don't forget that vehicles can be either positive or negative earth, but the practical arguments for isolating the earthy terminal still hold regardless. Andy Quote Link to comment Share on other sites More sharing options...
Lauren Child Posted March 4, 2015 Share Posted March 4, 2015 And don't forget that vehicles can be either positive or negative earth, but the practical arguments for isolating the earthy terminal still hold regardless. Andy I think we'll agree to disagree on that one. Quote Link to comment Share on other sites More sharing options...
woodsmoke7 Posted March 10, 2015 Share Posted March 10, 2015 Just a standard interstart cable, methinks? Andy thanks Quote Link to comment Share on other sites More sharing options...
woodsmoke7 Posted March 10, 2015 Share Posted March 10, 2015 This is the standard socket for British army vehicles since the 50's so you should be able to pick up a lead or at last a couple of plugs to make your own. Often seen on stalls at W&P and the like. Ok thanks for that, just need a lead as kraz has plugs(which are British) Quote Link to comment Share on other sites More sharing options...
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