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In addition, the single gang shallow base, Cat. Zone 1. In Class I, Zone 1 locations, all wiring methods permitted for Class I, Division 1 locations and Class I, Zone 0 or Zone 1 locations, including requirements for sealing, shall be permitted. Zone 2. The Allen-Bradley line of hazardous location devices features copper-free less than 0.
Standard barrel devices are suitable for mounting in panel thickness up to 1 in. Both style operators offer a unique locking bracket which provides an anti-turn feature to guard against loosening. The mounting rings in front of the panel are knurled to provide a second means of tightening each unit into the panel. The sealing flange shown below may be purchased as an option or as an accessory. A Type 4 rating can be achieved by using sealing nuts to seal the push button operators in addition to using the sealing flange.
Sealing nuts are available as accessories see page By utilizing either a sealing well or flanged sealing well, these stations may be installed without a conduit seal off in most applications subject to applicable codes and laws. The sealing wells shown below may be purchased as an option or as an accessory. Sealing wells are also available with an integral Type 3 flange seal for outdoor applications. Sealed switch contact blocks are another way to eliminate the need for conduit seal fittings in most applications subject to applicable codes and laws.
Sealed switch contact blocks may be purchased as an option on assembled stations by changing the Bulletin No. Sealed switch contact blocks can be ordered as an accessory see page A push button station with a sealed switch contact block is shown below.
Push Buttons & Signaling Devices