Leviton T5625 has shutter (tamper resistant) mechanism that blocks access to the contacts unless a two-prong plug is inserted. My understanding is this mechanism prevents child from sticking piece of metal into receptacle and getting shocked. Tamper resistant receptacles are code for new home construction, and receptacle is marked with TR. The light switch part of device works at all times, with or without two-prong plug in receptacle.
http://www.leviton.com/OA_HTML/ibeCCtpItmDspRte.jsp?item=388754§ion=24614&minisite=10026Electricians test, they don't guess.
Let's test your wires using ordinary two-prong tester.
Tape wood sticks to tester leads to keep hands away from power. Stand on dry surface or wood boards. Do not shake or sweat.
Separate wires for testing
Turn power ON.
Test each wire to bare ground wire.
Tester lights up on Hot wire. Hot wire connects to either dark-colored screw, as long as there is a brass connector plate that connects both dark colored screws. If connector plate is missing, add a jumper wire between both dark screws so they are connected together.
Hot wire is identified.
Now test Hot wire to each other wire, except bare ground wire.
Tester lights up on neutral wire. Neutral wire connects to silver screw.
If neutral wire is white wire, AND both white wires were connected together before, then they both connect to silver screw.
The last wire is the Load wire that goes to fan, light, motor. Load wire connects to brass colored screw.
Double check instructions with instructions on new device.
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