Do the NEMA 3R Heavy Duty safety switches have knock outs?
Product Design Features
Heavy Duty Safety Switches
The NEMA 3R Heavy Duty safety switches with a 'RB' suffix (30 up to 200 ampere) in the catalog number will have a hub opening in the top endwall. It will accept 3/4" through 2-1/2" B type hubs. The hub opening is covered with a closing cap (BCAP). There will be knockouts located in the bottom endwall of the enclosure, lower sidewalls and lower backwall. The NEMA 3R Heavy Duty safety switches with a 'R' suffix (400 up to 1200 ampere) do not have hub openings or knockouts.