|Friends Life t20, Taunton|
|Somerset 155-4 (18.5 overs) Northants 152-7 (20 overs)|
South African Alviro Petersen hit an unbeaten 64 from 35 balls as Somerset easily chased down Northants' 152-7.
The Steelbacks reached a competitive score largely thanks to David Willey's 47 and Ben Duckett's late 15 not out from six deliveries, including a six and a four from the final two balls.
After losing Marcus Trescothick for a duck, Craig Kieswetter (21) and Peter Trego (41) led Somerset's assault.
But Petersen's fireworks took centre stage, finishing with a 19-run over.
It was Somerset's second victory in the FLt20 Midlands, Wales & West Group, which moves them level on points with Northants, who are second in the table.