Lockout Collar:

Part of the switch bushing that prevents the toggle lever from being moved accidentally. There are many styles to allow for the desired operating features of the switch.

IP64:

IP rating indicating that the item is resistant to dust and protected against splashing water.

Logic Level:

An electrical load that simulates a computer input circuit, typically 5 volts at 10 milliamps or less.

IP65:

IP rating indicating that the item is resistant to dust and protected against water projected by a 6.3 mm nozzle against enclosure for 3 minutes at 100 liters per minute of 100 kN/m² at distance of 3 meter.

Low Level:

A very small load; 30 millivolts at 10 milliamps.