AN EMB145 CLBING OUT OF FL200 DECLARED AN EMER AND DIVERTED DUE TO ELECTRICAL SMOKE AND SMELL IN COCKPIT AND CABIN.

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UPON CLBING OUT OF FL200; MY FLT ATTENDANT NOTIFIED ME OF A SMOKE SMELL IN THE GALLEY; WHICH WAS LATER CONFIRMED AS MY FO INVESTIGATED. THE SMELL WAS OF BURNED PLASTIC. SUSPECTING THE #2 PACK OR BLEED WAS THE CAUSE; BOTH WERE SHUT OFF PER CHKLIST. THE SITUATION SEEMED TO IMPROVE TEMPORARILY; HOWEVER APPROX 10 MINUTES LATER; THE SMELL BECAME EVIDENT IN THE FLT DECK. THIS TIME THE SMELL WAS NOW ELECTRICAL. AT THAT TIME; THE FLT ATTENDANT ADVISED VISIBLE SMOKE IN THE CABIN. I IMMEDIATELY DECLARED AN EMER AND REQUESTED VECTORS TO ZZZ. SOMETIME WHILE THIS WAS HAPPENING; WE RECEIVED A PITOT 3 INOP MESSAGE AND I PROCEEDED TO ACCOMPLISH OUR ELEC FIRE CHKLIST IN THE QRH. AFTER COMPLETING A FEW ITEMS ON THE CHKLIST; THE SMOKE SEEMED TO DECREASE IN INTENSITY IN OUR DSCNT INTO ZZZ. ONCE THE AIR WAS A LITTLE CLEARER; THE FO AND MYSELF WERE ABLE TO TAKE OFF OUR OXYGEN MASKS AND LAND UNEVENTFULLY IN ZZZ. WE WERE MET BY EMERGENCY VEHICLES; WHO PERFORMED AN EXTERIOR INSPECTION INDICATING NO SMOKE. WE WERE THEN ESCORTED TO A GATE TO DEPLANE. THERE WERE NO INJURIES AND NOBODY RECEIVED MEDICAL ATTENTION ON SCENE. UPON MAINT INSPECTION; BEHIND A PANEL ON THE FO'S SIDE CONSOLE; A FIRE WAS QUITE OBVIOUSLY THE SOURCE AS THERE WERE NUMEROUS BURNT WIRE BUNDLES; EVIDENCE OF HIGH HEAT AND FLAMES ON SOME OF THE METAL RELAY SWITCHES.CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE SMOKE AND FIRE WAS UNDER THE FO'S SIDE CONSOLE BUT THE VENT SYSTEM WAS REMOVING THE SMOKE AND SMELL FROM THE COCKPIT AND INTO THE GALLEY VENT SYSTEM. DURING THE EMER PROCS; THE #2 PACK WAS SHUT DOWN AND THE SMOKE AND SMELL WAS THEN NOTED IN THE COCKPIT AS THE VENT SYSTEM WAS OPERATED FROM THE #2 PACK. ON THE GND; WHEN MAINT REMOVED THE R CONSOLE COVER; DAMAGE WAS FOUND TO THE WIRE BUNDLE AND RELAYS. THE RPTR KNOWS OF ONE OTHER RPTED FIRE IN THE FO'S CONSOLE AND THIS MAY HAVE RESULTED IN AN AIRWORTHINESS DIRECTIVE.CALLBACK CONVERSATION WITH RPTR 698681 REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT AFTER THE #2 PACK WAS SHUT DOWN; THE SMOKE AND HAZE WAS VISIBLE IN THE COCKPIT. AN EMER WAS DECLARED AND A DIVERSION WAS MADE TO A SUITABLE ARPT. WHEN ON THE GND; THE FO'S CONSOLE PANEL WAS OPENED UP AND EVIDENCE OF HIGH HEAT DAMAGE WAS FOUND ON THE WIRE BUNDLES AND TWO RELAYS. THE RELAYS MAY HAVE BEEN ASSOCIATED WITH THE R PITOT HEAT CIRCUIT AS A #3 PITOT HEAT INOP MESSAGE WAS RECEIVED.