Cut Sheet

NEC:
Class I, Division 1 and 2, Groups B, C, D
Class II, Division 1 and 2, Groups E, F, G
Class III
NEMA 3, 7CD, 9EFG
Applications
• Push buttons and selector switches are used in conjunction with
contactors or magnetic starters for remote control of motors.
They provide circuit control and/or selection.
• Pilot lights provide visual assurance that an electrical function is
being performed at a remote or local location.
• EFD/EFDB and EDS factory sealed control stations confi ne
arcing of device within the enclosure, preventing ignition of
ignitable atmospheres during control operation of motors and
other equipment.
• Used in classifi ed areas where fl ammable vapors, gases or
highly combustible dusts are present.
• For installation in chemical and petrochemical plants, refi neries,
and other process industries.
Features
•
EFD/EFDB Push Buttons and Selector Switches
— Eliminate need for adding sealing fi ttings and compound at
each conduit entrance.
— Heavy-duty push buttons, 10 Amp, 600 Vac rated.
— Dozens of possible combinations of push buttons, pilot lights
and selector switches.
— Smooth, rounded integral bushing in each EFD/EFDB hub
protects conductor insulation.
— Accurately tapped, tapered hubs for tight, rigid joints and
ground continuity.
— Stainless steel push button shaft operates within stainless
steel bushing assuring long, maintenance free operation.
— Push button and selector switch contacts are silver cadmium
oxide which are “sealed” in lower phenolic chamber isolated
from corrosive elements. Assures positive contact and long,
trouble-free operation.
— Enclosed stainless steel helper spring prevents accidental
operation of push button in severe vibration installations.
— Push button models also available with dust cap for use in
areas where excessive dust, moisture or corrosive conditions
are encountered.
— Corrosion resistant captive stainless steel hex head cap
screws hold EFKB covers to body.
— All EFD/EFDB momentary push buttons are supplied with
lockout type guards as standard. Hole in guard will accept
locks with up to 1/4” hasp. Permits locking of push button to
prevent unauthorized operation.
— Clearly marked terminals with brass screws assure quick,
easy wiring.
• EFD/EFDB Pilot Lights
— Factory sealed pilot lights supplied with red jewel/guard
assembly and 120 Vac/Vdc, 50/60 Hz, 6 Watt, Type 6S6 lamp.
— Models also available in combination with factory sealed push
buttons and selector switches.
• EFD/EFDB Selector Switches
— Factory sealed selector switches furnished with nylon cam-
operated, heavy-duty push buttons for either 2-position or
3-position maintained contact operation.
— High thermal and arc resistance, high dielectric strength.
• EDS Push Buttons
— Factory sealed — eliminates need for adding sealing fi ttings
and compound at each conduit entrance.
— Heavy duty, 10 Amp, 600 Vac.
— Switch is enclosed in separate sealing chamber.
— Sealing chamber has smooth, double fl anges that mate both
to cover and mounting enclosure to provide fl ame-tight joints.
— Pigtail leads from push buttons are factory sealed in sealing
well.
— Stainless steel hex head screws attach sealing chamber to
cover and mounting enclosure.
— Side rocker arm push button has lockout holes.
— EFD/EFDB backbox supplied with internal ground screw.
Standard Materials
• EFDB control stations: malleable iron body with copperfree
(4/10 of 1% max.) aluminum cover
• SPBB push putton: copperfree (4/10 of 1% max.) aluminum
upper barrel and phenolic lower barrel with nylon plastic button
(dust cap models have neoprene buttons)
• SPLN/SPLS pilot light: copperfree (4/10 of 1% max.) aluminum
guard and body assembly; steel clamping ring; and tempered
glass jewel
• SSBA selector switch: copperfree (4/10 of 1% max.) aluminum
operator mechanism, nylon cam, and sealed phenolic contact
block
• EDS control stations: malleable iron body and cover; copperfree
(4/10 of 1% max.) aluminum sealing chamber; and nylon
operating handle
EFDB Push Button EFDB Photocontrol
EDS Rocker Arm
Push Button
EFDB Push Button
with Dust Cap
EFD Combination Pilot
Light and Push Buttons
EFDB Pilot Light EFDB Selector Switch EFDB Maintained
Push Button
Controls
NEC/CEC CLASS/ZONE RATED HAZARDOUS LOCATION CONTROL STATIONS AND SWITCHES
Visit our website at www.appletonelec.com or contact us at [phone].
© May 2014
300
EFD/EFDB and EDS Series Factory Sealed Control Stations and Pilot Lights
Explosionproof, Dust-Ignitionproof
 Indicates items which are suitable for Class I, Division 1 and 2 Group B. See product selection pages for suitable items.