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Jumper wires and pre-crimped leads are two distinct kinds of electrical components, each of which has its own unique use and application field. Jumper wires are used for making temporary, short-term connections between two pieces of equipment. Pre-crimped leads, on the other hand, are used for making permanent, long-term connections between two pieces of equipment.

Jumper wires are typically constructed from insulated single-strand copper wiring in a variety of colors and gauges. The ends of the wire are capped with spade, ring, or bullet connectors that can be attached to electrical terminals or contact points on various electrical components or devices. The particular type of connector required will be determined by the type of connection to be made. Jumper wires can allow up to 3A of current to be passed and are typically only used in temporary set ups, such as testing or troubleshooting an electrical system.

Pre-crimped leads are used for making permanent electrical connections between two electrical components or devices. They are made by pre-attaching electrical connector pins to rigid or flexible electrical conductor wire. These pre-crimped leads can then be connected to terminals on electrical components in order to make electrical interconnections or pass electrical current. The wires are available in a wide range of sizes and insulation types, and can be used for DC or AC current applications.

Jumper wires and pre-crimped leads are both indispensable in different kinds of applications. Jumper wires are most commonly used in repairs, testing, and troubleshooting applications, because they are quick and easy to use. Pre-crimped leads, however, are mostly used for making permanent electrical connections between two pieces of equipment. They are a more secure and reliable method of passing electrical current than jumper wires.

The working principle of jumper wires and pre-crimped leads is fairly straightforward. In the case of jumper wires, an electrical connection is made between two contact points simply by attaching the terminals of the connector to the corresponding contact points. Pre-crimped leads, on the other hand, are used to pass current between two contact points by attaching the electrical connector pins to the corresponding contact points. Both methods allow for a secure connection between two electrical components, while providing continuous electrical current or signal.

In conclusion, both jumper wires and pre-crimped leads are invaluable when it comes to making secure electrical connections between two pieces of electrical equipment. Their use cases and application fields vary, with jumper wires being a quick and easy way to make temporary connections, and pre-crimped leads being suitable for making permanent electrical connections. The working principle of both types of components is straightforward, making them useful and reliable for different kinds of electrical engineering applications.