I’ve found some power armor, but I can’t use it yet without training. I assumed that the Brotherhood of Steel would train me, if they like me enough.
I’ve completed the Brotherhood of Steel quest series for the overseer (the original one, I did not overthrow him), but I did not get any Power Armor training. What do I have to do to be able to wear Power Armor?
Power Armor Training in FO:NV is available at the end of a few different quest chains in order to provide access for a variety of paths.
From the Brotherhood: After completing Eyesight to the Blind or Still in the Dark, wait 24 hours for the lockdown to end, and the Elder will offer you PA:Training, whether McNamara, or Hardin. (Hardin may ask you to go blow up the Silver Rush before offering training.)
Alternately, you can complete Arcade Gannon’s follower quest, For Auld Lang Syne – in addition to rewarding you with the unique Tesla Power Armor, you’ll receive the necessary training to use it.