What is the maximum voltage allowed on an NMD-90 cable?

NMD-90 cable, often referred to as non-metallic sheathed cable, is commonly used in residential wiring applications in Canada. The specification of NMD-90 indicates that it is rated to handle a maximum voltage of 300 volts. This rating ensures it is suitable for typical household and light commercial applications where voltages do not exceed this level.

Using cables with the appropriate voltage rating is essential for safety and compliance with the Canadian Electrical Code. Cables with ratings higher than actually needed do not offer any additional benefit in typical service conditions but are designed to withstand certain conditions, including insulation ability and the ability to handle potential overload situations.

This voltage rating serves as a guideline and is crucial when selecting appropriate wiring for any electrical installation, ensuring that the system remains safe and reliable under normal operating conditions.