TPS2596: TPS2596: Two quick questions.

Two quick question on Efuses.

I am building a split rail power supply for +/- 5v and +/-15 v for both 100/300 ma.   I would like to use an eFuse in the design.  So the question are

1. Where should I place an efuse?
   1. At the input to the voltage regulators
   2. or after at the output?
2. How does on set up an eFuse for a '-' power rail. Is it just  same as a '+' rail??

I was going to use LT1054 as the regulator/converter

Cheers

John