Most states want 70% or higher to pass.
Start 2-3 months before your test. Put in about 60 hours total, studying 2-3 hours each day.
Most places let you bring a basic calculator and NEC code book with tabs. Ask your testing center for their rules.
Tests have 80 to 100 multiple-choice and true/false questions. Minnesota's Class A master and journeyman tests use 80 questions.
Most states want 70% or higher to pass.
Test time runs 4 to 5.5 hours, changing by state. Minnesota gives 5.5 hours for all tests.