Noticed a smoke detector circuit today where the bare earth wire was taped with insulating tape on the exposed parts outside the sheath, and was being used as the interconnect.
I know the lack of an earth is not a big deal in this type of circuit (class II)but is the interconnect live with supply voltage during the alarm phase or is it just a signal voltage below 50V?
I know the lack of an earth is not a big deal in this type of circuit (class II)but is the interconnect live with supply voltage during the alarm phase or is it just a signal voltage below 50V?