Builders used to use rebar or steel wire mesh in decks, but now they use fiber reinforced concrete and they think that they don't need the rebar or wire mesh.
Even though you might not need the steel for strength, you need it for bonding.
The other issue is that the NEC allows the use of just a wire loop, which is inadequate.
I will probably need to contact the code committee and tell them to require the steel rebar or steel wire mesh or copper wire mesh in all decks.
In any case, when you have an electrician out, have them do the checks on the neutral for current.
It's really not that hard.
You just clamp around the neutral and see what's what.
You might need 3 clamp ammeters to do the check to see if the 3 wires all add to zero.
The ammeters should be true RMS for best accuracy.
Even though you might not need the steel for strength, you need it for bonding.
The other issue is that the NEC allows the use of just a wire loop, which is inadequate.
I will probably need to contact the code committee and tell them to require the steel rebar or steel wire mesh or copper wire mesh in all decks.
In any case, when you have an electrician out, have them do the checks on the neutral for current.
It's really not that hard.
You just clamp around the neutral and see what's what.
You might need 3 clamp ammeters to do the check to see if the 3 wires all add to zero.
The ammeters should be true RMS for best accuracy.