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so then it wouldnt be carrying the 16 amps or so that the 20 overcurrent would allow.

Jay a 20 amp breaker will allow 20 amps for at least 3 hours and likely forever.

It may even allow 24 amps forever.

The standard modeled case breakers we use for branch circuits are hardly precise devices and much depends on the ambient temperature where the breaker is located.

If your interested, look at some trip curves for breakers, they can be found at the web sites of the manufacturers. [Linked Image]

[This message has been edited by iwire (edited 11-23-2006).]

Bob Badger
Construction & Maintenance Electrician
Massachusetts