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if you know the gauge of the wire you can learn its current carrying capacity
You can put three ccc's in a conduit (any size conduit) before you derate. Keep in mind that for single phase loads (lighting, receptacles) the neutral is also counted as a current carrying conductor. This derating factor does not apply to nipples 24 inches long or less. See NEC Table 310.15(B)(2)(a) for full details on derating regarding ccc's.
The gauge of a wire measures its cross-sectional area and helps determine its current carrying capacity.
The gauge of a wire is related to its cross sectional area and therefore defines its current carrying characteristics.
no it will only decrease the current carrying capability
if your load draws a max of 15 amps then you would use 14-16 gauge wire. the lower the gauge the more current that is allowed to pass. there are charts that show max current for diameter of wire
American Wire Gauge. Measure the thickness of the cable.
what is the current carrying capasity of 16mm cable
No, the electrical code states that no conductors of similar conductivity in sizes smaller that #1/0 copper shall be permitted in parallel.
The gauge (thickness) of the wire along with the material (copper, aluminum, etc) and the length are factors affecting the current capacity, not voltage. The insulator properties, or distance from other conductors will affect the Voltage capability.
It is a gauge that measures electron flow or current. Current is usually described as amperage. Therefore the AMP gauge.
Upto about 16 Amps, provided the cables aren't wrapped or bunched up somewhere hot.