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All About Fence Insulators Electric fence insulators are molded from polyethylene (plastic) or made from porcelain. They are designed to fasten electrified wire to different types of posts without losing energy through the post. There are several styles to choose from because the insulator must match both the type of wire and the type of fence post being used. | | | FAQs about Insulators 
Q: Which insulator should I use? A: It depends on a few key things: -
What type of post would be the first question: wood post vs. T-posts? -
Next is what kind of wire is being used: steel, polytape or polyrope? -
Another thing to consider is the number of corners and end posts you will be using since they take more tension and need to be stronger.
Q: Why do I need to use an insulator for my electric fence? A: The electric fence insulator keeps the charged wire from grounding out on the post or other grounded wire. If a “hot” wire touches a post or ground wire, there will be a short in the line and the fence may not be charged, then the animal will not feel the shock. Q: Why are there both porcelain insulators and plastic insulators?
Is one better? A: Both porcelain insulators and plastic insulators will keep the charged wire from grounding out on the post or other grounded wire. Porcelain insulators are used for standard electric fence systems and for high tensile fence systems. They are usually more expensive than plastic insulators. Plastic insulators are generally used for standard electric fence systems only, unless otherwise designated for a high tensile fence. Q: Will the plastic insulators withstand bitter cold temperatures?
What about porcelain? A: Both types of electric fence insulators can withstand bitterly cold weather. Porcelain insulators will last for a long time but will cost more. Fi-Shock™ provides all the insulators that you will need for most electric fence projects. When used properly, they will last for years or a lifetime. 
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