Ring Terminals
Ring terminals attach to screws or bolts, forming an extremely tight and secure connection. They are made from conductive materials like copper or brass and are often covered in tin to make them more conductive and corrosion resistant. This type of terminal is generally used where movement is a factor, such as a car engine or somewhere in an industrial installation.
Different wire gauges and bolt diameters require various sizes of ring terminals. These terminals are color-coded to make it easy and quick to choose the right one and to ensure proper installation. The insulation of a ring terminal can be, for instance, vinyl insulated, nylon insulated, or heat shrink, which are materials that effectively shield the often exposed part of the terminal against unfavorable environmental conditions.
Installing ring terminals usually means using a crimp tool to attach the terminal securely to the clean, stripped end of a wire. The installer can also ensure a reliable soldered connection if desired. Among the most common places to find these terminals are electrical panels, where every screw terminal accommodates a ring lug, and battery banks—both the kind you find in a car and the big, heavy ones used to back up uninterruptible power supplies in server rooms. Ring terminals are great where connections are unlikely to be disturbed.
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