walshie 2,804 Posted September 14, 2014 Report Share Posted September 14, 2014 My lamp has given up the ghost. Having taken the lamp apart and the bulb out, it's none of those. The male cigarette lighter attachment has seen better days. The negative wire has broken right by where it's soldered on and my soldering skills are non-existent to the point i don't even have a soldering iron. Easy - cut the plug off and buy a new one ready wired and soldered and use a terminal block. Only thing is some are advertised as no fuse, some as 5a and some as 10a. What one do I need for a 100w bulb? Cheers. Quote Link to post Share on other sites
Chid 6,615 Posted September 14, 2014 Report Share Posted September 14, 2014 (edited) Id go for the 10 amp , though I never use a fuse on my lamps , one more thing to go wrong Edited September 14, 2014 by chid21 2 Quote Link to post Share on other sites
South hams hunter 8,935 Posted September 14, 2014 Report Share Posted September 14, 2014 12v, 100w - 12÷100 = 8.33333 so a 10 amp fuse will cover it. Always use the connection blocks for lawnmowers myself. Clean, strong and waterproof but takes less pressure than the wire so should come out before the wire breaks inside anything 1 Quote Link to post Share on other sites
walshie 2,804 Posted September 14, 2014 Author Report Share Posted September 14, 2014 12v, 100w - 12÷100 = 8.33333 so a 10 amp fuse will cover it. Always use the connection blocks for lawnmowers myself. Clean, strong and waterproof but takes less pressure than the wire so should come out before the wire breaks inside anything Cheers. i was thinking of going that route myself, but then i won't be able to plug the lamp into the car if i need to. 10a it is then. Quote Link to post Share on other sites
Brigzy 1,298 Posted September 14, 2014 Report Share Posted September 14, 2014 Fuse and connector are just more things to go wrong. Cut them both off and crimp spade connectors to the two wires and push them directly on to the battery. Quote Link to post Share on other sites
Chid 6,615 Posted September 14, 2014 Report Share Posted September 14, 2014 12v, 100w - 12÷100 = 8.33333 so a 10 amp fuse will cover it. Always use the connection blocks for lawnmowers myself. Clean, strong and waterproof but takes less pressure than the wire so should come out before the wire breaks inside anything Your sum is the wrong way round 12÷100 = 0.12 .... Quote Link to post Share on other sites
South hams hunter 8,935 Posted September 14, 2014 Report Share Posted September 14, 2014 Get something cheap like to phone charger cut the phone connection with put another box on that an have one on your battery, what we always did. Well truth be told we wired connectors in to the cab and on to the back of the truck so could just plug the lamps inside, outside an into the batteries Quote Link to post Share on other sites
Chid 6,615 Posted September 14, 2014 Report Share Posted September 14, 2014 Fuse and connector are just more things to go wrong. Cut them both off and crimp spade connectors to the two wires and push them directly on to the battery. spades are just another thing to go wrong and pull off, buy a battery with bolts on the terminals and wire it that way Quote Link to post Share on other sites
South hams hunter 8,935 Posted September 14, 2014 Report Share Posted September 14, 2014 No it ain't chid pal, it's hard you work out the amps lol Quote Link to post Share on other sites
South hams hunter 8,935 Posted September 14, 2014 Report Share Posted September 14, 2014 Fuse and connector are just more things to go wrong. Cut them both off and crimp spade connectors to the two wires and push them directly on to the battery. yeah but they're the first things to go wrong so easy places to look Quote Link to post Share on other sites
Lid 194 Posted September 14, 2014 Report Share Posted September 14, 2014 Yup - Watts = Volts x Amps so Amps = Watts / Volts = 100 / 12 = 8.33 A . Quote Link to post Share on other sites
Chid 6,615 Posted September 14, 2014 Report Share Posted September 14, 2014 No it ain't chid pal, it's hard you work out the amps lol 12÷100=0.12 100÷12=8.33 Quote Link to post Share on other sites
South hams hunter 8,935 Posted September 14, 2014 Report Share Posted September 14, 2014 Just reread it, had it writ in my head but wrote it backwards. Cheer pal lol Quote Link to post Share on other sites
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