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Module three: Core Electrician's Tools

Types of Crimp Connectors 


Ring Terminals 

Flat Blade Terminals

Fork Terminals 

These are typically used where the wire is going to be attached using a nut and bolt or a screw.

Ideal for inserting the ends into a terminal block that uses a screw to secure the connection.

These can be used to slip under the head of a flat headed terminal screw before it’s tightened down.

Splices (Butt and Parallel) 

A butt splice has an internal stop for the wire half way through, whereas a parallel splice doesn’t. They are both used for permanent wire joints.

Pin Terminal

These are a compact flat blade crimp connector that fit in small screw terminal blocks; frequently found in electronic circuitry.

Bullets male/female

A version of the spade terminals that lets 3 wires be joined and un-joined

Female/male push on
(spade) terminals

These are used to make joints that can be taken apart. Unless an additional sleeve is used they are not fully insulated and are most likely be used on low voltage DC control circuitry.

Boot Lace Ferrules

Boot lace ferrules are crimp connectors that slip over the end of multi-strand wire. The nose of the ferrule is then crimped on to the wire. This makes the end of the wire perfectly suited to be inserted into a terminal and screwed down.

Now that you know about the different types of crimps, its worth finding out about the different types of Crimping pliers.

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