PH-NH//Pro F fire-resistant bus duct is made of insulating pouring material with a reactive flame retardant. The conductor is covered with ceramic fiber cloth, and the insulating partition of the joint is made of high-temperature resistant mica material and coated with a metal fire-resistant layer. The products meet the requirements of standards such as GB/T18380.3, GA/T537, and IEC331. They are suitable for use in locations such as generator outlets in distribution rooms, fire circuits, and other places with fire resistance requirements. They meet the requirements for simultaneous fire sprinkling in case of a fire.