Hi,

I'm interested in when it is allowed (NEC) and advisable to make a
connection in an electrical box of a wire to a screw terminal by
looping the wire around and then using the free end for another
connection. Here's what I think I know:

1) It is NOT allowed to do this with the hot or neutral conductors and
the screw terminals on a device. Use pigtails.

2) It is allowed to do this with the EGC and the grounding screw of a
metal box or strap. This is a good idea, because it makes a
neater, tighter installation.

So I think this only leaves the case of the EGC and the ground screw
on a device. Is looping allowed here? Is it a good idea?

Thanks,
Wayne

P.S. FWIW I'm just contemplating my three gang switch box and how to
handle the 8 grounds (5 cables and 3 screw terminals). One option
would be loop a ground around each of the 3 devices, and use a wire
nut on the 5 ground wires. Another is to use 3 pigtails; joining the
8 ground wires would require splitting them into two groups and using
two wire nuts with a jumper between them.