This is a question on 4 pole switching nuetral. In our specification we called for fusible manual transfer double throw switch rated for service equipment application, 225A, and a switching neutral. However, I have resreached several companies, they do not make any fusible switch that comes with 4-pole. Why is 4-pole option not avilable? Moreover, I was told these profucts are not UL rated? Is it becasue when you switch or separate a bonded neutral that becomes a concern? How do you get a switching neutral for bonding to a separately derived system per NEC that will satisfy the UL requirement?
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