50-977

Technical Characteristics

• Knob Manufacturer Part Number

  a

• Style Designator

  tap, circuit selector

• Features Provided

  actuator knob

• Mounting Method

  bracket single mounting facility and threaded hole single mounting facility

• Mounting Facility Pattern

  four position circular single mounting facility

• Mounting Facility Circle Radius

  1.156 inches nominal single mounting facility

• Hazardous Locations/environmental Protection

  explosion proof

• Terminal Type

  tab w/screw

• Overall Length

  2.531 inches nominal

• Switch Contact Basic Design

  nonpile-up symmetrical

• Switch Actuator Indexing Position Quantity

  2 single actuator

• Contact Voltage Rating In Volts

  120.0 ac at sea level

• Overall Width

  2.157 inches nominal

• Contact Switching Action

  makes before breaks each section front

• Nominal Thread Size

  0.190 inches single mounting facility

• Switch Actuator Positioning Increment

  90.0 degrees single actuator

• Switch Actuator Stop Device Type

  fixed stop single actuator

• Overall Height

  2.157 inches nominal

• Individual Section Quantity

  2

• Pole Quantity

  1 each section front

• Thread Class

  2b single mounting facility

• Knob Manufacturer Code

  82121

• Thread Series Designator

  unc single mounting facility

• Thread Quantity Per Inch

  24 single mounting facility

• Contact Load Current Rating

  10.0 amperes resistive load ac at sea level

• Switch Actuator Momentary Position

  clockwise single actuator and counterclockwise single actuator

• Throw Quantity

  2 each section front