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What type of knockouts are on Safety Switches?

On all safety switches (DG - general duty; DH - heavy duty & DT - double throw), knockouts are on these switches when using a Nema 1 or Nema 3R switch up to 200 amps.

Standard Hubs:

DS075H1           0.75"                      DS100H2            1.00"
DS100H1           1.00"                      DS125H2            1.25"
DS125H1           1.25"                      DS150H2            1.50"
DS150H1           1.50"                      DS200H2            2.00"
DS200H1           2.00"                      DS250H2            2.50"
                                                         DS300H2            3.00"

On all other switches including the Nema 4/4X and also stainless switches, no knockouts exist.

In place of having the knockouts, the customer can cut a hole at the top of the switch and then would use a Myers Type Hub.  Myers hubs are:

DS050MH          0.50"
DS075MH          0.75"
DS100MH          1.00"
DS125MH          1.25"
DS150MH          1.50"
DS200MH          2.00"
DS250MH          2.50"
DS300MH          3.00"
DS350MH          3.50"
DS400MH          4.00"
DS500MH          5.00"