In which conditions must connections be provided with fire-resistant features?

Connections must be provided with fire-resistant features when operating above 60 VDC due to the higher voltage, which can lead to arcing and increased susceptibility to ignition if there is a fault or failure in the system. At higher voltages, the risk of electrical fires escalates, necessitating solid fire-resistant materials and design features to contain any potential hazards.

This is particularly crucial in environments where electrical systems may be exposed to flammable materials or conditions that could exacerbate a fire hazard. Therefore, integrating these features into connections above 60 VDC is essential for enhancing safety and preventing catastrophic incidents.

While options related to lower voltages, specific applications, or exposed wiring may also have their own safety considerations, the critical threshold for fire resistance in connections based on voltage levels is that 60 VDC.