I started as and electrician apprentice a few weeks ago, and I will be starting IEC in the fall. Any advice from some seasoned electricians would be greatly appreciated.
I spent a few decades as an Electrician, started fresh out of High School as a helper/apprentice and worked my way up to Master Electrician, Foreman, Superintendent, Inspector etc. This is what I did when I was coming up as an apprentice in the 90's, and what I told my oldest Son who is currently an apprentice paying his dues. Buy yourself an Ugly's Book (Electrical) and study it every day (just a little, every chance you get). Start with definitions and memorize them. Then start memorizing your conduit bending formulas (multipliers). Laminate a little cheat sheet and keep it on you, test yourself (your memory) regularly. Then start memorizing how many/what size & type conductors can legally fit in what size conduit. Memorize all of the different conduit fittings, the different types of cable & wiring, and memorize as many abbreviations as you can. There's a TON more to learn, but that's a good start. You will be ahead of the others if you dedicate yourself to studying/memorizing the above mentioned.
The most important advice I can give you is this. Never, under any circumstances, take anyone's word that a circuit you are about to work on is locked out. If you are going to put your hands on anything, ALWAYS verify that 1) you are working on the correct circuit and 2) verify YOURSELF that the circuit is de-energized and locked out/tagged out properly. Invest in a meter and learn how to use it. I was 18 when I first learned this lesson. My Foreman almost killed me. I cut into 277V on a lighting circuit that my Foreman had locked out for me. Blew up, knocked me off of a 12' ladder and I landed on a steel deck. Yes it hurt. Later in life I watched one of my best friends die of electrocution (480V) because he took our Supervisor's word on an energy isolation. I have many more stories, but I'm not telling you all of this to scare you. Electricity is nothing to be afraid of, but it demands respect. If you don't know something, ask. If you're working with an old crotchety Journeyman (I worked under a few) that doesn't like you asking 50 questions during the day every day while he's trying to focus on what he's doing, then save your questions. Write them down in a tally book/notepad and ask questions when it's a better time.
Holler at me if you ever need anything.