It is easy to put a 2-inch long piece of conduit that is less than half an inch in any cross-sectional measure into a half-inch conduit.
According to the 2005 NEC Annex C, table C.1 you are allowed nine #12 THHN conductors in a 1/2" trade size EMT conduit. If your conduit run is any length at all, you would be wise to increase the conduit size to 3/4". as pulling 9 #12's for any length in 1/2" EMT is very difficult.
The electrical code stated that two # 10 wires can be pulled into a half inch conduit.
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Yes. Actually they should be run in the same conduit. You don't ever want to run parallel separately.
It varies by conduit type. If you don't know the type, use 9.
Need to know the wire # size to compute wire fill in conduits
6 nches
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All conduit shall not have more than 360 degrees for it's length between either a box, cabinet, or conduit body. Couplings count as a continuation of conduit.
using half inch conduit for a 13 in 90, the bender takes up 5 inches so you subtract 5 inches from 13 inches and place the arrow at 8 inches.