Do contactors have enough internal resistance on their feed side to be wired straight into a circuit with only a light switch in it?
You know a 6 Amp MCB that feeds a light switch that then feeds the live side of the contactor and then from the neutral side of the contactor a neutral back to the board.
The supply side of the contactor would have a 6 Amp MCB feeding a line into the contactor and then a line out to a lamp/ lamps and then a neutral back to the board to complete the supply circuit.
Basically I want to use a contactor to feed our garage lights off an electric door, the electric door has a small light that illuminates when the door is opened and I want to use this lighting signal to switch on an few fluoro's.
The thing I am worried about is blowing the PCB in the garage door and that is why I am asking if contactors have an internal resistance on the feed side of the device, I would hate to think the contactor would allow enough current through it to blow the garage door control unit up.
So basically what sort of internal resistance are we looking at on the feed side of a contactor, how much current will they let through?
Thanks very much.