You can have all the "technical" information in the world, and it won't do you a bit of good unless it's PRACTICAL.
I have going on seven years heavy-duty experience with bears lusting after my chickens. A lot of this involves close observation and close interaction of and with bears.
I can boil it down to one thing: a hot wire, no matter the volts or how many strands, is going to do anything to deter bears unless the wires are up against an impassable surface. This means a bear will jump over or between strands of hot wire, not even feeling the charge through his thick fur. But if you install the hot wire at nose level against a solid surface, and at the top of a fence, the bear will first test the wire with his nose or tongue, thus the purpose of the peanut butter, because they need to "research" where they intend to be going.
I've watched a bear jump gracefully between the two strands of hot wire I run around the far perimeter to keep cattle away from my buildings, and not even touch it. But I've seen a bear encounter the peanut butter on a wire that's against the garden fencing and get a jolt and run off.
I haven't had any penetration of my run or coops or gardens by bears since I've employed the hot wire close against these enclosures.