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Power to electric fuel pump

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Darylle:
Hi everyone
What is the best + source for an electric fuel pump, can I use the alt wire? 

sirfixalot:
Electric fuel pump feed has to be switched thru ignition should also cut off if engine stops ie in an accident usually uses a signal pulse from Tacho or an input from an oil pressure sensor on engine

Vettech:
In C4's the +ve is supplied from ign switch in crank position only, when engine fires/runs the +ve is supplied from the "Oil Pressure switch". This ensures if oil pressure lost or engine stops, fuel is immediately stopped. As Sirfixalot says.

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