Although there is a risk of shorting out the battery charger, the risk is small and usually mitigated by the circuitry of the battery charger itself. On the other hand, the short-circuit current of a lead-acid battery installed in a vehicle is large enough that a short circuit may cause a fire or explosion. Therefore, the priority is to avoid short circuits of the vehicle battery, rather than the charger.
Although the term "SAE connector" is commonly used to refer to a two-pin connector, many different connector standards specified by SAE International may also be referenced by this term. Also, while the design of the theme connector is inspired by and based on SAE standards, the connector itself does not have an official SAE name.
After research, we found that there is no specification for SAE2 pin overmolded connectors. SAE (Society of Automotive Engineers) specification J928 covers "Electrical Terminals - Pin and Receptacle Types" and SAE J1239 covers 4, 5 and 8 pin trailer connectors, but there does not appear to be an SAE specification for a 2 pin overmolded configuration.
The SAE connector is a physically self-mating hermaphroditic two-conductor DC connector commonly used in solar and automotive applications. It is named after the Society of Automotive Engineers that created the specification on which this connector is based.
Although the plugs are physically hermaphroditic and any SAE connector can be connected to any other SAE connector, they are not electrically hermaphroditic and care needs to be taken to maintain correct polarity when connecting different plugs to each other.
This connector is often used to impose maintenance costs on vehicle batteries. The polarity of the connector, when installed in a vehicle and connected to the battery, will never cause a short circuit if the exposed terminals touch the vehicle chassis. In most vehicles, this means that the exposed terminal is connected to the negative terminal of the battery. Instead, the positive terminal on the battery charger is exposed to mate with the hidden positive terminal on the vehicle side.
A banana plug is a plug that is generally installed at both ends of the speaker wire and is inserted into a banana socket. The plug takes its name from its slightly bulging shape. It is very convenient to insert into the hole on the front of the multi-purpose socket mentioned above, and can also form a very large contact area after insertion. This feature makes it preferred for use in high power output equipment for connecting speakers and receiver/amplifiers.
Sometimes you can also see banana plugs divided into two groups, called "dual banana plugs", but not all equipment (especially speakers) can be used. Originated in Germany after the First World War, the original form was assembled by a base + an iron nail + a shrapnel. Since the original shrapnel was stamped into four leaf-like shapes from metal sheets, after it was assembled into the nails, it would be reversed. A banana peeled into four pieces is named "banana plug".
Due to its excellent electrical performance, simple assembly method, and low-cost finished products, banana plugs are gradually applied to industrial instruments, teaching instruments, power testing, radio models, medical instruments, automotive testing, audio equipment and other fields. The contact methods of banana plugs mainly include shrapnel type, pin type, cross groove type, and roll type.
A banana plug is a general-purpose one that is installed at both ends of the speaker cable and is used to insert a banana jack. Let's take a look at the use of banana plugs and what to pay attention to when buying?
Banana plugs and sockets should be securely installed on the outside of insulating boards, electrical panels and switchboards. When installing the three-hole socket, be sure to install the grounding hole (large hole) on it, and the grounding terminal must be connected to the grounding wire, and do not use the neutral wire as the grounding wire. The phase wire should be connected to the specified terminal (marked with the letter "L"). The 220v power supply entering the socket is usually "left zero right phase". At the same time, it has a combination socket with two-hole and three-hole sockets, and it is mostly used as a mobile socket.
The rated current of the banana plug or socket should be greater than the rated current of the load connected to the connected appliance, and cannot exceed the rated current of the power socket. When using the mobile plug, keep it clean and pay attention to moisture to avoid leakage or short circuit.
When connecting some single-phase three-pin plugs, sockets or three-phase four-pin sockets, the ground wire must be connected to the terminal of the ground symbol and connected to the metal shell of the electrical appliance to ensure safe use. The plug and socket must be in firm contact when wiring, and the metal heads on the adjacent terminals should be kept at a certain distance, and there should be no burrs to avoid short circuits.