He is in fact correct. Electricity is the movement of electrons from one atom to the next. Electrons are negative. A fully "charged" battery is empty, and you fill it with electrons that get pulled in from the negative part of a circuit. Hole flow is a concept, not a physical thing. Same with signal flow. But, we in general use hole flow and signal flow when designing and even troubleshooting electronics.
The telephone system from day one until today. Is -48vDC. The backup battery float voltage is -54vDC. Pick up your old POTS land line phone and its -48v at the phone. Everything in the central office routers, servers, switches and even the emergency room lights are -48vDC.
Sorry your wrong on the 90 degree brush plate rotation effecting starter rotation. The MZ series starters by Prestolite will change rotation if you rotate the com end plate 90 degrees, the plate is marked R or L, which ever one is lined up with the battery post will give you right or left motor rotation. The MZ series starters were used on WWII era Willys Jeeps and industrial engines like Wisconsin, Hercules and Continental. Sent from my iPhone using The H.A.M.B. mobile app www.speedoservice.com Should I rush your rush job or the rush job I was rushing when you rushed in?
Many years ago a neighbor bought at auction a well-preserved mid-twenties Dodge that had been in storage close to 3 decades. We tried all day to see if we could get that ****er started, checking and proving out every component that could affect starting. Eventually, an old-timer stopped by, saying "Ya know, these cars was 12 volts". Eureka, it fired right up!
Thank you for this thread! I've been dealing with this while wiring up my dad's 53' F-100 which is positive ground, and this thread reminded me that I need to re-check all of those connections as I'm pretty sure I've got most of them backwards....
At one time old Joe Lucas pe***ioned Parliament to repeal Ohm’s law, but it met with too much resistance. If Lucas made guns, wars would never start. Joe Lucas: “A gentleman does not go motoring around after dark”. Sent from my iPhone using The H.A.M.B. mobile app
Hm, I wonder if the Apollo program Lunar Module and the CSM were positive, or negative ground? I'm sure the engineers weren't going to leave that stuff to chance. I'm thinking it would have had to be negative ground, because of ground support and test equipment compatibility. I've heard, maybe here - if someone connects a battery charger up wrong to a dead battery, it will charge up with reversed polarity. It won't work very well, but it will work and this "feature" has caused some headscratching.
Very likely. Most electronics these days use negative ground. I doubt if water, rust, and corrosion are a problem in outer space. They would be at sea though. Any navy guys here ? What about submarine batteries for example.
This isn't too far off-subject. It's about a positive ground, though unintended. I had an under-dash melt-down one cold morning at the bank. It was the fuel pump wire that shorted out. I got home by wiring the heater switch to it. I asked a friend what is worse than smoke coming out from under the dash. He said "Flames?".
Many interesting points on this thread. A friend has a repair shop he has owned for over 50 years. He likes to work on the older stuff. A guy brought in a 39 Lincoln with a charging problem. It had been to a few shop's, no one had been able to sort things out. John took a look, switched the battery cables and everything worked." No charge & you are welcome "
Am told that anodes (+) corrode. Metals theory sez cathodic protection stops corrosion. I sense that a "lower" (-) is less likely to rust, corrode or, discharge, in answer to which cable to pull. (+ or -) Moisture will bring discharge, you lucky dry Southwest folks. (First thought that holes were (+) ions, but 'vacancy' works too)
I have to go outside & change my Flux Capasitor Air in my tyer's from Winter Air to Spring air & my Batt to Neg. Ground! I like to be Different.! Just my 3.5 cents Live Learn ^ Die a Fool
ok....thanks....never done anything to the started......usually have to mess with the points after the little Red Ram has been sitting....think I messed with the coil - but being kinda not an ace - I looked over at one of my others and got the connection correct by accident on the 56 Savoy. My little 1967 Morris Minor gave me the headache until I got a manual....think it was still a positive ground up that far.
Lucas systems actually uses AC current; it just has a random frequency. Lucas is also an acronym for Loose Unsoldered Connections And Splices.
I have a 1970 Harley with elec starter. Starter ran backwards. I rotated the brush mounting plate 90 degrees & the armature definitely changed direction. Greg
Yep, we used to put those Harley 4 brush Prestolite starters in electric start Nortons, because the ones they came with were only two brush. Had to rotate the brushes a quarter turn to spin the right way.
Don't know about other manufactures, but Mopar was the 1st of the big three to use alternators. 1960 or '61. Facts are facts and you are right. But, I think you missed the joke in there. Lucas: The prince of darkness! -Dave
No, I didn't miss it. I have had 2 Lucas wired vehicles, they were awful. I just wanted to give credit where it was due since Mr. Kearns was screwed by Ford, then Chrysler.
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