So I just passed my DC certification on my third attempt and honestly I'm still in shock. The first two times I went in thinking I could wing it with a few days of reading, and the exam absolutely humbled me. Topics like load calculations and grounding/bonding tripped me up way more than I expected — the questions are weirdly specific and nothing like what I'd seen in basic electrician courses.
What finally made the difference was actually committing to a structured DC practice test routine. I was doing timed sets every morning for about three weeks straight, maybe 45 minutes before work. It forced me to stop guessing and actually understand why the wrong answers were wrong. I also leaned hard on a DC study guide that broke down the NEC chapters section by section instead of just throwing definitions at you.
For anyone else who's stuck, what topics are giving you the most trouble? Happy to share the specific resources I used if it helps. The exam is totally passable — it just demands a real strategy.