No, they are not the same. Earth ground refers to a connection to the actual ground (earth) for safety and noise reduction in electrical systems. Chassis ground, on the other hand, is a connection to the physical chassis or enclosure of a device for grounding purposes to prevent electrical shock and interference.
Think of it as the skeleton that the body and all the components of a car are supported by. It also is a well known architecture for embedded computer systems. There are many types of chassis ie. VME, PC-104, but the definition refers to a container of something.
The term chassis is the frame plus the "running gears". So, the chassis is the frame, engine, drive shaft, differential, transmission...etc
This sounds like an earth problem check battery to chassis & chassis to engine earth connections also check earth to alternator best wishes
"Ground" is an important concept in electronics and it has practical significance. Ground provides a reference from which all other voltages are "measured". It is generally held a zero volts. Ground comes from the old nomenclature of "earth ground" and sometimes it is still referred to as "earth". Occasionally, you will see "chassis ground". Chassis ground refers to the voltage of the electronics chassis, which sometimes is isolated from earth ground and there may be (usually there is) a voltage differential between earth ground and chassis ground. The intent of most three prong plugs is to keep the chassis ground the same voltage as earth ground. If this were not the case, there could be the potential (pun intended) of a nasty shock.
All chassis/frame grounds are connected to Earth ground.
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body on frame
The term "Chassis Cab" refers to a body style and a type of vehicle found mostly in duty truck commercial trucks. These types of vehicles are used to transport various types of packages all over the world.
A; By wearing a wrist strap connected to chassis and grounding the chassis to earth ground
The chassis of electrical equipment is typically connected to the Earth through the Ground (Earth) terminal of the electrical outlet. This is why building wiring should (or must, in many areas) include an on-site Earth ground connection. Earthing of equipment chassis is a safety measure taken to help prevent electrical shock in the event of an insulation failure or a short circuit. If there were no chassis-ground connection, a hot wire which accidentally comes in contact with the chassis could cause the user to get a serious shock. If there's no Earth connection available, use a GFCI outlet to help prevent electrocution.
The chassis part of the car was prepared first. This is a sentence which contains the word chassis.