The 90º Bend
The 'Stub-up', or 90º bend is usually the first bend that an electrician learns.
A 90º bend simply consists of one 90º bend at a desired distance from one end of
a length of conduit.
Using Hand Benders
A 'deduction' is required to lay out and fabricate a 90º bend in a piece of conduit.
Most hand benders used for small EMT and rigid conduit have a standard deduction
and a bending mark or arrow printed on the bender. Many benders refer to this as the
'B' Mark. Most hand benders also use a standard deduction of bending small conduit.
Check the table below for common standard deductions.