Help wiring replacement Honeywell to Nest 3rd gen
As per https://www.doityourself.com/forum/thermostatic-controls/596703-honeywell-nest-thermostat-wiring-help.html

I used following wire mapping from honeywell to nest and I have been up and running for a few days without issue

C = C

Rc = Rc

Y = Y1

G = G

R = Rh

W = W1