Serve¹⁾ or serving²⁾ - a textile yarn wrapped around a wire, especially a Litz wire, to protect the insulation coating from damage (abrasion), or to provide additional electrical insulation.³⁾

Silk serve on a Litz wire

^{S. Zurek, E-Magnetica.pl, CC-BY-4.0}

A Litz wire with serving is sometimes called served Litz wire.⁴⁾

Serve can be made of cotton, silk, Rayon, Nylon and other textile materials, depending on the manufacturer and application.⁵⁾

• Litz wire
• Twistite