The joint ASME/CSA standard for elevator and escalator electrical equipment, establishing safety and performance requirements for controllers, drives, and electrical components used in vertical transportation systems.
Full Definition
ASME A17.5 / CSA B44.1 is a joint standard published by the American Society of Mechanical Engineers and the Canadian Standards Association. It establishes the construction and performance requirements for electrical equipment used in elevator and escalator systems — including controllers, variable-frequency drives (VFDs), wiring, contactors, transformers, and motor control centres. The standard defines dielectric strength tests, temperature rise limits, short-circuit withstand ratings, and protection against moisture and dust ingress. Components conforming to ASME A17.5 are certified by accredited testing laboratories (e.g., Intertek, UL, CSA Group) and must bear the appropriate certification mark before installation in equipment covered by ASME A17.1 or CSA B44. The standard is particularly relevant for OEM panel builders, elevator manufacturers, and contractors sourcing elevator-rated electrical components in the North American market. Compliance is mandated by most US state and Canadian provincial elevator codes as a prerequisite for installation approval.
