As such the NEC says to do as the manufacturer specifiesġ10.3(B) Installation and Use. Not sure why you thought it necessary to resurrect a six-year-old zombie thread that already had the correct information provided, but to address your first point: The circuit breakers are listed devices. The city inspector should catch this when he re-inspects for the building permit.
#Amperage for 10 gauge wire license
The electrician was probably an apprentice who worked on someone else’s license which is common on residential electrical, but is supposed to be reviewed by a master electrician who is supposed to sign off on any non masters work. Essentially two 10 gauge wires are considered single gauge wires, not the same as one stranded 6 or 4 gauge wire. In the example of two 10 gauge wires on a 60 amp breaker, as combined two 10 gauge wires are still only capable of carrying 30 amps before they could catch on fire. You cannot use two wire of smaller gauge to double the size of the breaker. Circuit draw as most on this web site determines the size of the wire which determines the size of the breaker. Eventually the weak breaker will not reset and breaker will need to be replaced. The building owner will be running back and forth constantly resetting the breaker. The more a breaker trips the weaker the springs and the easier it trips. If you have two appliance plugged in, under normal load they could both pull 13 amps or putting a load of 26 amps which will trip the breaker. Also the reason you do not want two 12 gauge wire on a 20 amp breaker is that under normal circumstances a 20 amp circuit does no pull over 13 amp draw. You can use this value in the fuse size chart above to determine the minimum wire size required. About this item Southwire 10 Gauge 20 Amp 120 Volt 500 Ft Multi-strand Thhn Wire (black) 500 10 Gauge Black Gas And Oil-Resistant Jacket 120V, 600V Max. Add the values and divide by 1000 to get your total current in Amps. Find the items that you’re installing and their current requirements. The breaker manufacturer is not the governing body for electrical issues, it is the NEC. To find the total amperage in your specific installation, refer to the table below.
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