Allowable ampacity for 10-2 copper NM-B is 30 A.
http://www.cerrowire.com/default.aspx?id=46
do islec have an agreement with NMB
Capacity for cable 70mm (143-212 amp) and may vary depending on installation method used.
NMB wire is a type of electrical cable commonly used in residential wiring. It consists of two or more insulated wires bundled together with a bare copper ground wire. NMB wire is designed for use in dry locations and is often used for powering outlets, switches, and lighting fixtures in homes.
Most local codes require that when extending or adding circuits, the circuit must be brought up to national code standards. This would necessitate that if you have a 2 wire circuit and are adding to it, that you rewire the entire circuit to 3 wires. However, in actual practice, it is common to see 3 wire nmb connected to 2 wire nmb without full re-wiring. It is important to note that when this happens, the ground wire in the 3 wire cable serves no purpose. You end up with what looks like a 3 wire grounding configuration at a receptacle or other outlet when in actuality you have no equipment ground. This allows a hazard to exist that no longer conforms to current code, and if someone were to be injured you may be held liable.
Allowable ampacity for 10-2 copper NM-B is 30 A.http://www.cerrowire.com/default.aspx?id=46
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nmb stannaz
The web address of the Nmb Area Museum Foundation is: nmbmuseum.com
The rule of thumb is 1mm square=6Amp so 10mm square will,for safety reasons and for a copper conductor, carry 50Amps.
Note me back
It is a North American electrical term. It is a combination the words amp and capacity rolled into one word "ampacity". When talking about how much amperage a wire can legally draw, it is referred to as the wire's "ampacity".