What is maximum power cord length to a window or wall room air conditioner?
Monday, May 4, 2020
The maximum length for a power cord to a room air conditioner is 10-feet for 120V units, and 6-feet for 240V, per 2017 National Electrical Code (NEC440.64). Here’s the complete citation:
440.64 Supply Cords. Where a flexible cord is used to supply a room air conditioner, the length of such cord shall not exceed 3.0 m (10 ft) for a nominal 120-volt rating or 1.8 m (6 ft) for a nominal 208- or 240-volt rating.
Also, see our blog posts What are the most common problems with wall/window air conditioners? and What is the average life expectancy of a package unit heat pump or air conditioner? and Can I run a window air conditioner on a portable generator?
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To learn more about heating and air conditioning systems, see these other blog posts:
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