Dryer Cord Wiring, How To Wire a 4 Prong and 3 Prong Dryer Cord and Dryer Outlet, and take a look at the 30amp dryer circuit wiring as installed in the electrical panel.
How to Install a 3wire cord for an older dryer, and installing a 4wire cord for a new dryer. Wiring a 3wure dryer outlet and a 4wire dryer outlet. See the dryer circuit wiring for a 3wire dryer and a 4wire dryer. DIY Electrical Wiring from an Electrician. Complete with easy to understand wiring examples, and an easy to follow process which is explained by a licensed electrical contractor.
UPDATE: The NEC code now has expanded the use of GFCI protection for dryers. However check with your local building department to see if they have adopted the code change and requirement. Not all states adopt NEC code updates.