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- What is the main difference between THHN and THWN wire?
What is the main difference between THHN and THWN wire?
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The THHN (Thermoplastic High Heat-resistant Nylon-coated) is used mainly in dry environments, while THWN (Thermoplastic Heat and Water-resistant Nylon-coated) is suitable for both wet and dry locations.
Most modern THHN wire is dual-rated as THHN/THWN-2, making it more versatile for different environments. If you need a specific product reference, don’t hesitate to ask about it here!
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