Pin ordering question

[DrMag]

Which order would you prefer, and why?

(1) +V, -V, Gnd

or

(2) +V, Gnd, -V

The voltages will never be more than +/-15.

(2) is more intuitive to me, but Pomona makes a 3-pin banana plug that has ground on the end.

[Nusa]

There isn't a hard and fast rule on that. I've seen it done both ways.

There's also:
3) V+,V-,GND arranged in a triangle so that a 2-prong banana plug will go in any two of the three terminals, depending on what you need.