candidus_cogitens said:Definitely, yes, elves CAN wear heavy armor while trancing.
A trance is not sleep. (And "rest" for elven wizards is not sleep either!)
Nothing in the rules, explicit or implicit, says that trance or rest should be treated as sleep as regards the matter of wearing armor.
The burden of proof would have to be on the side of those who wanted to assert that elves SHOULD suffer the fatigue effect.
While I don't like it, I agree with candidus that trance the way its used in the phb is different from sleep, and therefore elves can trance in full armor.
I don't know if WOTC wanted it that way or not, but that's the way the rules state it.