Cut Sheet

Class I, Division 1, Groups C, D
Class I, Division 2, Group B, C, D
Class II, Division 1 and 2, Groups E, F, G
Class III
NEMA 3, 7CD, 9EFG
Applications
• Designed to prevent arcing of enclosed switches in ignitable
atmospheres during connect and disconnect operation of
lighting and light power loads.
• For use in classifi ed areas where ignitable vapors, gases or
highly combustible dusts are present.
• For installation in:
— Chemical plants
— Petrochemical plants
— Refi neries
— Other process industries
Features
• Enclosures have external mounting lugs for ease of mounting.
• Smooth, rounded integral bushing in each hub protects
conductor insulation.
• Enclosures furnished with internal ground screw.
• 20 Amp and 30 Amp units available for use with 120-277 Vac.
• Smooth ground mating surfaces assure fl ame-tight joint
between cover and mounting enclosure.
• Stainless steel hex head cap screws for attaching cover to
mounting enclosure.
• Choice of front-operating or side rocker arm handle—each may
be locked in ON or OFF position.
• Each handle has close-tolerance threaded stainless steel shaft
to meet Explosionproof requirements.
• Enclosures furnished with internal ground screw.
Options
• 1- or 2-gang copperfree (4/10 of 1% max.) aluminum bodies
and covers available. Add suffi x – SA.
• NPBRKT nameplate mounting bracket to make circuit
description/identifi cation easy.
— Pre-drilled holes in bottom of bracket allow direct mounting
to control stations with existing cover bolts.
— Pre-drilled holes in middle of bracket allow mounting of
customer’s circuit identifi cation nameplate; epoxy glue
may also be used for mounting (phenolic nameplate not
included).
— Bracket eliminates costly fi eld installation of drilling and
tapping to accommodate circuit identifi cation nameplate.
— Brackets fi t side-by-side on 2-, 3- and 4-gang boxes and
3-devices.
Standard Materials
• Body and cover: malleable iron
• Handle: nylon 6/6
• Optional nameplate mounting bracket: corrosion resistant
stainless steel
Standard Finishes
• Tumbler switches: triple-coat—(1) zinc electroplate, (2)
chromate, and (3) epoxy powder coat
Certifications and Compliances
• UL Standards: UL 894, UL 1203
• UL Listed: E10523, E81751
Separate sealing chamber and switch construction.
Used on 20 Amp 4-way and all 30 Amp models.
Explosionproof Labyrith Switch
Used on all 20 Amp models excluding 4-way.
 Indicates items which are suitable for Class I, Division 2, Group B. See product selection pages for suitable items.
Controls
CONTROLS: HAZARDOUS LOCATION CONTROL STATIONS AND SWITCHES
Visit our website at www.appletonelec.com or contact us at [phone].
© January 2011
277
Contender
®
Series Factory Sealed Front Operated Tumbler Switches
Explosionproof, Dust-Ignitionproof
Malleable Iron Body and Cover
✝
. Furnished with Internal Ground.