Werner Electric Supply has their own quick, reference pocket guide for some of the most common tasks.  We call it a 'Want Book' since everybody wants them!  Below are links to the individual pages within the book.

Allowable Conductor Ampacities

Full Load Current of Single and Three Phase Transformers

Heat Loss Calculator

Locked-Rotor Indicating Code Letters

Maximum Number of Conductors and Fixture Wires in Electrical Metallic Tubing (EMT)

Maximum Rating or Setting of Motor Branch-Circuit, Short-Circuit and Ground-Fault Protective Devices

Motor Installation Data

Voltage Drop Calculations (Inductance Negligible)

To print out a Werner Electric 'want book', click here.