Yardmaster96
there is no electrocution concern from just one bus bar-you need to get across both to get shocked.
And the 10 Amps is not a concern for dangerous shock unless you’re standing in water😁 or otherwise sufficiently extensively grounded.
The heat issue of the bus bar will only occur if you have a loose wire connection on the bar, or a long term “short” across the rails-which will/should trip your breaker.