How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
How do I determine the age of a Challenger electrical panel?
Friday, August 6, 2021
The first two numbers in a stamp at the wiring diagram on the door of a Challenger panelboard are the week of manufacture, and the third digit is the year. This does not tell you which decade, which will have to be determined from other clues. The example above was in a house built in 1990, so we were able to determine a 1989 production date.
Challenger panels were produced from the mid-1970s until 1994. They have had multiple manufacturer recalls, and many insurance companies will not accept them. See our article Why are Challenger electrical panels not insurable? for more on this.
Also see our blog post How do I find out the manufacturer of an electrical panel?
To find the age of other home components, go to How can I find out the age of a roof? and How do I determine the age of my air conditioner? and How do I determine the age of my water heater? For life expectancies, visit What is the average life expectancy of the components of a house?
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Field Guide for Home Inspectors, a quick reference for finding the age of 154 brands of HVAC systems, water heaters, and electrical panels, plus 210 code standards for site-built and manufactured homes, and the life expectancy rating of 195 home components. Available at amazon.com for $19.95.
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