Some of its advantages are excellent conductivity, good corrosion resistance, high tensile strength, and low electrical resistance. Let’s go over the advantages and disadvantages of each:Ĭopper is the most commonly used wire conductor for residential electrical systems. The Impact of Wire Size Materialĭifferent wire materials have their own set of benefits and drawbacks. High ambient temperatures can mitigate the temperature rating of the wire, which impacts its ampacity. The ambient temperature should be considered when installing the wire. The NEC specifies temperature ratings for different wire types, and the selected wire size should meet or exceed the required temperature rating. Some wire types have lower ampacity at higher temperatures, while others are designed to withstand elevated temperatures. Higher temperatures can affect the wire’s ampacity and safety. The temperature rating is an important consideration. Copper is commonly used for its high conductivity, while alum is also used but typically requires a larger wire size due to its lower conductivity. The wire size should be selected to minimize voltage drop and maximize capacity within acceptable limits. Voltage drop can affect the performance of electrical appliances.
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