excersise main breaker?

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Old 10-18-18, 07:20 AM
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excersise main breaker?

I had to turn off main breaker for a few minutes today... got me to wondering, should a main breaker be excersised yearly or does opening/closing them cause wear?
 
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Old 10-18-18, 07:43 AM
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I've never seen anything from the manufacturers that require it, but it probably wouldn't hurt to break the crud loose a little bit. Opening and closing breakers does cause wear, but they are rated for several thousands of cycles so it's not significant.
 
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Old 10-18-18, 03:14 PM
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Probably a good idea. But I would do it with minimal loads. What wear there is would be related to arcing damage to the contacts.
 
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