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Doug Miller Doug Miller is offline
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Default need to downgrade breaker (from 40amp to 15amp) for new hvac?

In article , Bud-- wrote:

I have one issue with your otherwise excellent post -- this last sentence:

And as has been a couple times, the breaker provides short circuit
protection for the wire, not overload protection.


The breaker provides *overcurrent* protection for the wire -- IOW, the breaker
is sized to open if more current is flowing through the wire than it can
safely handle. This does not occur solely through short circuits, but can
result from overload as well (e.g. fifty 60W incandescent light bulbs on a
single 15A circuit is supposed to pop the breaker, even though there is no
short).

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.