How Do You Setup A Backup Tstat?

[The Serpent Merchant]

So going off my initial setup is this correct?:

1. Backup Tstat plugs into wall and set to a tolerable high temp.
2. Main Tstat plugs into Backup Tstat (which is always on due to higher temp setting)
3. Rack or power strip plugs into Tstat.
4. If power strip, racks plug into power strip.

Sounds like you have the general idea.