how to wire a two prong DELL Inverter for 9400/1705 laptops ? Need the DC plug for the 1705E and the two prong AC plug for Optima 700Ah's from a defunct inverter. The DC plug has 3 operative contacts: inside sheath, outside sheath and pin. The DC plug cord carries 3 wires.
ON the DC cord: what is ground, what is power, is the ???? inside sheath for neutral circuit breaker use.
How to wire ? care is required given the unit's costs and possible tricky computer circuitry with the 3rd wire.