A 4 pole transfer switch is required if your generator will be considered a “separately-derived system”. This article should be helpful.
Yes, our Surge Suppression Protection (SSP) option provides a 40kA-rated SPD, pre-installed in the ATS enclosure. Other ratings can be specified to meet your requirements.
Lake Shore Electric’s Parts Dept. can be reached at (440) 232-0200 Ext. 224.