Portable generators and 4 pole transfer switches
Quite often I find clients wanting to be able to power one of their panelboards with a portable generator. This is often accomplished with a transfer switch with a external twist lock receptacle on the line side of the "crucial" panel.
After reading similar posts and manufacturer's info would it be safe to assume that for the configuration described above, a three pole transfer switch must be used.
I say this because the owner is unlikely to drive ground rods and connect his grounding electrode conductor (as would be required for an SDS) when he parks the generator and plugs it into the twist lock.
Related question, if you use a 3 pole transfer switch, the generator's neutral to ground bonding jumper needs to be removed.
"In this house, we obey the laws of thermodynamics" - H. Simpson.