Wiring the distribution box without a ground wire
If your metal electrical box lacks a dedicated ground wire, your primary options are to bond it to an existing metal conduit system (if present and continuous) or to install a Ground-Fault Circuit Interrupter (GFCI) device, such as a GFCI receptacle or circuit breaker, to provide. The following methods detail code-approved ways to achieve a safer electrical environment when a traditional ground wire is absent. It's possible that there's a ground wire that's connected to the box, but if this is original 1948 wiring, that's unlikely. As noted above, a GFCI receptacle is now required in the kitchen and installing them adds protection even if they're not.
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