negative ground systems have always been in use but some chose to use positive grounds as wires were poorly insulated and suffered from corrosion on negative earth systems but positive earth systems did not suffer as badly to corrosion (i heard somewhere Henry Ford came up with the positive ground idea cant say for sure)
in recent times insulation is greatly improved and with bridge rectifiers instead of contact rectifiers which caused more uneven power flow to the battery most decided to use the same system putting everything on negative ground for simplicity but you will always have one oddball who uses positive ground just for the sake of being different
It doesn't have to be rectified. That's the ONLY advantage; the electrical systems in all but the smallest planes are 400Hz AC systems.
The answer is: They are not. Whosoever told you that is off his meds. Alternatively, in some special applications there may be a reason for it. Many DC systems use a common ground where the loads are encased in the ground (like starter motors). Thus all breakers are positive, but some don't. If the loads don't care about polarity and the positive and ground are not common (like with a metal chassis), positive and negative is irrelevant.
earth
No, Their are no electrical systems that are totally safe. Elections harness electricity not control it.
Many banks will hire an electrical engineer to assist with their online, phone, and e-banking systems. The engineer will be working with the networking and hardware to insure the systems are running properly.
Some never used positive ground and always had negative ground. The last year that I know where positive ground was used was in 1969 when Jaguar switched to negative.
BEcause the electricity actually runs from The Negative side of the battery to the Positive. Electrical charge is a "Negative" charge. But the layman thought that sounded wrong and eventually even the english gave in and went to Negative ground systems.
List the positive and negative impact on ethical issues of information systems.
If the 49 dodge truck is still on it's original 6 volt electrical system it is positive ground. All 6 volt auto systems are/were positive ground. All 12 volt systems are negative ground.
Vehicle Electrical System GroundingFor MOST automotive electrical systems, NO, the positive battery terminal is NOT the ground. In most vehicular electrical systems the positive terminal is the "HOT" terminal, not the ground.The NEGATIVE TERMINAL IS ESTABLISHED/USED AS GROUND, in almost all vehicles.It is important to note that there are occasionally some exceptions to this standard, and you need to determine which grounding system is used on any vehicle BEFORE messing around with the electrical system.
If you want to jump start your car, connecting negative to negative and positive to positive is the only way to do it. Connecting negative to positive will result in extensive damages to the electric systems of both cars.
12 volt DC Negative ground.
MGB, up to 67, or further. My GT was.
Neither, they are East. On computer systems longitudes West are represented by being given as negative, so they would be represented by being positive.
The color of the wire does not indicate its polarity. In electrical systems, the polarity is typically designated as positive (+) and negative (-) rather than plus or minus. To determine which wire is positive or negative on a lamp connection, you would need to consult the manufacturer's instructions or use a multimeter to check the voltage.
That depends on the vehicle. Some use negative ground and some use positive ground. Most modern cars (after 1970 or so) use negative ground electrical systems, but it's best to check the manual for the particular model of car your are working on. Typically, positive ground systems will be found in British cars such as Triumph and some really old American cars.
In a DC circuit Red is positive and Black is negative. In AC systems White is neutral and Ground is green or green-yellow stripe.