Copper used in buildings, typically for roofing, oxidizes to form a green patina of compounds referred to as verdigris. THWN wire can run in wet environments for prolonged intervals devoid of getting rid of efficiency. It may also withstand temperatures nearly 90 degrees Celsius. THWN wire is the most effective https://yesbookmarks.com/story18260745/buy-wall-ties-no-further-a-mystery