frodien11
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Posts posted by frodien11
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On 4/19/2019 at 6:17 PM, paulengr said:
First you confirmed a “15 A” breaker trips at 12 A if you give it long enough. Hence “continuous”
vs. noncontinuous loads. Continuous is defined as 3+ hours. See this from the horses mouth:
https://www.ul.com/wp-content/uploads/2014/09/CircuitBreaker_MG.pdf
See section 38. Miniature molded case breakers under 250 V cannot be 100% rated at 15 A.
For normal cases the “15 A” rating applies. It might take 3 hours (Code maximum) to trip at 80% but it will get there eventually. I can personally confirm some brands are more aggressive about the 80% rule than others. See for instance the trip curves for Siemens QPs used in residential panels:
https://w3.usa.siemens.com/download-center/default.aspx?pos=details_mobile&fct=downloadasset&assetid=2218136&page=1&search_str=&languagefilter=&displayfiltercolumn=&displayfiltervalue=&language=en&datapool=&sortcolumn=&sortorder=ascending&
The curve only goes to 10,000 seconds but it is obviously trending towards tripping at 80% eventually. This is one of the least aggressive breakers out there as far as the 80% rule,
The list I posted is for AFCI, not GFCI. Since new construction AFCI must be combination (AFCI+GFCI) and trust me, you want that version of you must install an AFCI, it sort of back doors GFCI into areas most people never considered. The general list for GFCI is bathrooms, garage and outbuildings, outside receptacles, unfinished basements and crawl spaces, kitchens, laundry, wet bars, and around pools. As the commenter said, almost any place associated with water or moisture. But there are almost more exceptions than rules for each of these so don’t take this list as gospel without reading the Code closely. For instance in kitchens it is for receptacles feeding a dishwasher, countertop areas, and “within six feet of a sink”. Not required elsewhere such as a refrigerator (if more than six feet from the sink) or over the counter microwaves. So you need both.
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