Solderless Electrical Terminal Assortment - 160 Pc

!±8±Solderless Electrical Terminal Assortment - 160 Pc

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Post Date : Dec 28, 2011 02:19:06
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Set includes: 10-12ga: ring terminals 55-5 4pc, 55-8 4pc, 55-10 4pc, male connect 5pc, female disconnect 5pc, butt connector 12pc. 16-14ga: ring terminals 2-6 10pc, 2-5L 10pc, 2-4L 10pc, bullet male connect & female disconnect 10pc each, spade terminal 2-4M 10pc. 18-14ga: butt connector 18pc, quick splice 4pc. 22-18ga: ring terminal 1.25-4 8pc, quick splice 4pc, butt connector 12pc. Includes handy re-sealable organized-by-size see-through case.****

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Understanding Welding Current Types and Polarity Settings

!±8± Understanding Welding Current Types and Polarity Settings

After reading many books on welding that mention current and polarity setting I got more confused than when I began! On top of that I have been at a job interview that required a written test on this subject. The way the test was written had me confused and questioning what I know. That should not have happened because before I started welding I went through two years of electrical school! Why does everyone make it so confusing when it is so simple!

Let's break down the two current types. First there is D/C or direct current and then A/C or alternating current. Wow just two of them! How could this be so difficult to understand?

Direct current or D/C is the type of electricity that your car battery has. D/C flows from one direction to the other. Direct current flows just like water and has only one direction.

A/C or alternating current is what your home uses and it changes direction many times in a second. In your home A/C changes from positive to negative about 60 times a second. With alternating current it does not matter witch terminal is (+) positive or (-) negative because the current changes direction many times in a second! No matter how you hook up your welding leads with A/C it will not matter.

When it comes to polarity types they only apply to direct current. Direct current flows just like water. It flows from the (-) negative terminal to the (+) positive terminal. The easiest way to remember this is the (-) negative side is always losing and the (+) positive side is always gaining. Think of it as pouring water from a pitcher to a glass. The pitcher or (-) terminal is losing water and the glass or (+) is gaining the water.

The way polarity direction applies to D/C welding is based on how much heat is concentrated on your electrode. The two polarity types are DCEP or direct current electrode positive and DCEN or direct current electrode negative. DCEP concentrates 2/3 of the heat on the electrode and DCEN concentrates 2/3 of the heat onto the metal that is welded. Think of polarity types in terms of water flowing from a pitcher to a cup. If you take the pitcher of water and pour it into a glass, the glass receiving the water gets most of the friction. So in this case the pitcher is the negative side and the glass is the positive side. The side that is gaining water is the side with the most friction. In comparison to welding, this is the side most of the heat is concentrated on.

There is a bit more to current and polarity types but getting the fundamental understanding is the first step. Later on the rest will come naturally. Once you start thinking about electricity in terms of water flowing it all becomes simple. Just take the time to think about how water would act and then learn what types of current and polarity types are used for different welding processes and why.

Understanding Welding Current Types and Polarity Settings

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Types of Electrical Connectors

!±8± Types of Electrical Connectors

There are many types of automotive and marine electrical connectors. Some of the common electrical connectors are butt connectors, ring terminals, spade terminals, and quick disconnect connectors.

Butt connectors are used to splice two wires together.

Ring terminals are used to connect the wire to a stud point like a screw for grounding or similar.

Spade terminals can be used like ring terminals but the nice thing about the spade terminal or fork terminals is that the stud does open to connect to it. The spade can slide around the stud for a connection.

Quick disconnect connectors are used to connect to a tab and come in four tab sizes,.110 tab is 1/8 inch,.187 tab is 3/16 inch,.250 tab is 1/4 inch and.375 tab is 3/8 inch. There are male and female quick disconnect connectors the female will slide onto the male tab. Other electrical connectors include copper lug ring terminals, crimp caps, t tap connectors, plier tap connectors, hook terminals, and pin terminals.

Electrical connectors can be insulated or non insulated and come in various types of insulation. The non insulated electrical connector is usually bare copper that has a tin plating. Insulated terminals can come in PVC insulated, nylon insulated and heat shrink insulated. The PVC insulated type are usually the cheapest and most common. PVC tends to be a harder insulation and can crack when crimped and for this reason I do not recommend using them. Nylon insulation is a softer insulation and will not crack when the terminal is crimped. The nylon insulation will also withstand higher temperatures. I recommend using nylon insulated terminals and connectors. Heat shrink insulated terminals and connectors are great for applications where the terminal is exposed to outside elements such as high temperatures, rain, snow, and underwater applications.

The heat shrink insulated terminals with adhesive lining create waterproof connections to the wire. Although heat shrink terminals can be costly they are the best connectors to use since the will last the longest and almost never corrode.

When purchasing electrical connectors it is best to use UL listed terminals and connectors to make sure you are getting quality connections. I recommend staying away from terminals and connectors that are made in China due to the low quality standards and cheap materials they use to make the connectors. If you search the internet you can find quality terminals and connectors at reasonable prices.

Types of Electrical Connectors

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