Life expectancy of an electrical panel – Electrician Talk – Professional Electrical Contractors Forum #life,expectancy,electrical,panel,


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I’m an IEEE member now, so I’m sure they have some specific stuff on that. I’m not real good at navigating their site yet, but what I found so far for AC breakers operating at less than 635volts, is that they are spec’d to endure anywhere between 1100 and 10000 operating cycles. Maintenance intervals on serviceable types are much lower than the rated operating cycle count, however. It’s doubtful that any molded case circuit breaker (other than those used for switch duty or motor starting duty) will ever see anywhere near that.

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Originally Posted by MDShunk

I’m an IEEE member now, so I’m sure they have some specific stuff on that. I’m not real good at navigating their site yet, but what I found so far for AC breakers operating at less than 635volts, is that they are spec’d to endure anywhere between 1100 and 10000 operating cycles. Maintenance intervals on serviceable types are much lower than the rated operating cycle count, however. It’s doubtful that any molded case circuit breaker (other than those used for switch duty or motor starting duty) will ever see anywhere near that.

operating cycles being opened and closed? Wow.

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02-29-2012, 08:23 PM

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02-29-2012, 08:24 PM

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Originally Posted by BuzzKill

Look at the original romex found in 40’s homes: many I find, the insulation is still pliable; inside jboxes and outlets are another story. Modern romex should last just as long.
Panels should be good for 50 years, depending on manufacturer.

Based on OP:
Life expectancy of an electrical panel
Does anyone have any data on the average life expectancy of an electrical panel? I’m talking about a residential panel, indoors, not exposed to a harsh environment, not overloaded.

I have found Knob Tube in better shape than 10 year old NM cable.

If installed properly and to specs. No problem.

I will agree,there is junk out there.

That is our job to decipher it and install quality for a reasonable price.


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