Cooper Crouse-Hinds EMP Manual De Instrucciones

EMP/EMPS BARREL ASSEMBLIES,
PANEL MOUNTED ENCLOSURES
Installation & Maintenance Information
APPLICATION
EMP/EMPS Barrel Assemblies include pilot lights, pushbutton switches,
illuminated pushbutton switches, selector switches, and combinations.
They are used in control stations, panels, and enclosures used in areas
made hazardous due to the presence of flammable vapors, gases, or
combustible dusts.
EMP Panel Mounted Enclosures are made in single, two, and three gang
sizes with the EMP Barrel Assemblies already mounted in the compact
enclosure. EMP Series Enclosures are used in areas made hazardous
due to the presence of flammable vapors, gases, or combustible dusts.
INSTALLATION
To avoid damage to equipment or personnel injury, electrical power
must be off before and during installation and maintenance.
EMP/EMPS Barrel Assemblies:
1. Determine whether panel or surface mounting will be used. (See
Figures 2 and 3).
2. Prepare explosionproof/dust-ignitionproof junction box (i.e. EJB as
shown in Crouse-Hinds catalog) with drilled and tapped openings at
planned locations for each barrel assembly. Centerline distances
between devices should be arranged to provide sufficient spacing
for electrical connections. Recommended centerline spacing
between devices is 2-1/4 inches. Depending on the quantity and
type of devices to be installed, closer spacings can be arranged.
3. Remove guards, indicating plates, jewel assemblies, outer locknuts,
etc. to enable barrels to be threaded into panel. Leave final locknut
on barrel for surface mounting applications.
4. Thread barrel assemblies into drilled and tapped holes from behind
so they protrude to the panel front.
5. Adjust length of barrel protrusion and thread inner locknut tightly
against inside wall for surface mounting. For panel mounting,
thread lock ring with set screw tight to outside of threaded wall, then
tighten set screw.
6. Replace guards, indicating plates, jewel assemblies, outer locknuts,
etc. The panel is now ready for installation and wiring connection.
EMP Panel Mounted Enclosures:
1. Prepare panel surface and locate the holes for the barrel assemblies
as follows:
• Single Gang — 1-1/8" diameter hole
• Two Gang — two 1-1/8" diameter holes on 1-5/8" centers
• Three Gang — three 1-1/8" diameter holes on 1-5/8" centers
Note: Maximum panel thickness — 3/4". See Figure 1 for gang
dimensions.
2. Remove guards, jewel assemblies, outer locknuts, and indicating
plates as required, to enable barrels to protrude through holes in
panel.
IF 872 • 03/08
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE
WARNING
Copyright © 2008, Cooper Industries, Inc.
IMPORTANT NOTE
When EMP and EMPS devices are to be installed in Crouse-Hinds
equipment, refer to Installation Instruction Sheet that came with that
equipment for proper installation.
Style 1 and Style 3 Dimensions
3. Place the barrel assemblies through the drilled holes from the rear
of the panel. Replace the guards, indicating plates, jewel
assemblies, and outer locknuts.
4. Adjust the position of the barrel assembly and secure by tightening
locknut and set screw. Bonding and grounding of the conduit and
equipment is required by the National Electrical Code
than one conduit enters an enclosure, ground continuity between
conduits must be maintained through proper bonding. A grounding
conductor, if used, must be connected to the conduit bonding
system. Use wire type and size as required by NEC and any other
applicable standards.
5. Install conduit runs and sealing fittings to comply with the
requirements in the latest edition of the NEC, Section 501.15 and
any other applicable standards as required.
Note: Enclosures with pilot lights only are factory sealed.
Enclosures with pushbuttons and/or selector switches
require external seals.
6. Remove rear access door, pull wires, and connect devices.
To avoid fire or explosion, check for dirt, grit, or other foreign material
on the mating surfaces of the cover and body. Be certain that each
surface is wiped completely clean before reassembling. Surfaces
must seat fully against each other to provide a proper explosionproof
seal.
7. Replace cover door, tighten screws, and pour conduit seals as
required.
IF 872
Figure 1
® . When more
CAUTION
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