How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manfuactured and modular homes
How do I determine the age of a Cutler-Hammer electrical panel?
Saturday, March 27, 2021
Cutler-Hammer load centers use a five-digit date code that’s at the bottom of the data sticker inside the box at the side. First digit identifies which plant manufactured it, second digit is the year, third and fourth digits are the week, and last digit is a code for the decade. So the second and final digits are the ones you want to look for. To decode the last digit:
+ is 1980 – 1989
= is 1990 – 1999
& is 2000 – 2009
! is 2010 – 2019
@ is 2020 – 2029
# is 2030 – 2039
$ is 2040 – 2049
So the F251& code shown above means that it was manufactured in 2002 (2nd year of the 2000 to 2009 decade), on the 51st week. The code is in very small type and turned sideways. We recommend that you do not open the panel box to find the date code unless you are familiar with the safety precautions to take when opening a panel.
Also see our blog post How do I find out the manufacturer of an electrical panel? And for the age of another manufacturer’s panel, go to How do I determine the age 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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Here’s links to a collection of our other blog posts about ELECTRIC PANELS:
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