Cooper Crouse-Hinds N2S Serie Información De Instalación Y Mantenimiento

Non-Metallic Control Stations N2S And
N2SU Series
Installation & Maintenance Information
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE
APPLICATION
N2S Series of control stations are used in conjunction with
magnetic motor starters or contactors for remote control of
motors and to visually indicate that the desired function is
being performed. The N2S Series of pushbutton stations,
selector switches and factory sealed pilot lights are used
separately or in combinations with a variety of standard
features and special options available. N2S Series control
devices are suitable for use in Class I, Division 2, Groups B,
C and D and the N2SU Series are suitable for use in
Class I, Division 2, Groups B, C and D and Zone 1 and 2
hazardous (classified) locations, as defined by the
INSTALLATION
WARNING
To avoid electrical shock, be sure all power is turned off
before and during installation and maintenance.
1. Loosen the captive screws in the cover, then
carefully lift off the cover and set it aside to prevent
damage to the gasket or devices. Do not remove the
control devices from the cover.
2. Select a mounting location that will provide suitable
strength and rigidity for supporting all contained wiring
and control devices. Use #10 size hardware
N2SU
1.97 in.
N2SU Series
(50 mm)
1.10 in.
(28 mm)
0.88 in.
(28 mm)
1.75 in.
(44 mm)
Entry Note
A .87 in. 22 mm. diameter 1/2" single entry
1.09 in. 28 mm. diameter for 3/4" single entry
B .87 in. 22 mm. diameter for 1/2" double entry
IF 703 • 4/05 Copyright
National Electrical Code (NEC) and Canadian Electrical
®
Code (CEC) as standard as well as in damp, wet or
corrosive locations indoors or outdoors.
N2S control stations are available with
hub sizes and N2SU control stations are available with
and inch hub sizes. Both series have 1 or 2 device and 3
3/4
or 4 device enclosure sizes.
to securely mount enclosure back box to the desired
location. Figure 1 shows the mounting dimensions of
both the N2S and N2SU
back boxes.
3. With the back box securely fastened to the
mounting surface, attach the body into the conduit or
cable system.
4. Pull necessary control wires into the enclosure.
Provide sufficient length for connections to be made in
a manner which will comply with all applicable codes
and standards.
N2S
N2SU
Figure 1
© 2005, Cooper Industries, Inc.
5. Bonding and grounding of the conduit and equipment
is required by the National Electrical Code
more than one conduit enters the enclosure, ground
continuity between conduits must be maintained
IF 703
through proper bonding. A grounding conductor, if used,
must be connected to the conduit bonding system. For
N2S Series, use Crouse-Hinds type GP bonding fittings
and install per wiring procedures shown. Use wire type
and size as required by NEC and any other applicable
standards.
To prevent damage to enclosure, make sure that the
cover gasket and body flanges are free of any foreign
, and 1-inch
1/2 3/4
substances before mating to ensure proper gasket
1/2
sealing.
Maintained
Stop
Pushbutton
®
National Electrical Code is a registered trademark of the National Fire Protection Association
Page 1 IF 703 • 4/05
6. Make the electrical connections utilizing the wiring
® . When scheme established for your system. Unit is ready
for wiring to devices mounted in the cover. It is not
necessary to remove any device from the cover for field
wiring. See Figures 2A and 2B for the contact diagrams
of pushbutton stations and selector switches. The field
wiring terminals on the switch units used for pushbutton
or selector switch stations are marked. The -| |- and "O"
indicates normally open contacts; and -|/|- and "C"
indicates normally closed contacts of the switch. These
contact blocks are provided with binding screw
terminals.
CAUTION
• Strip the insulation on each conductor wire
back 3/8".
• Use a slotted or Phillips head screwdriver to loosen
the field wiring terminal screws the required 3 or 4
turns.
• Insert the bare wire conductor(s) on either side of
the terminal screw(s), under the terminal wire
clamp(s) and securely tighten the screw(s).
Note: Do Not exceed 15 in. lbs. of torque.
Copyright 2005, Cooper Industries, Inc.
©
Figure 2A
Field Wiring Diagram
Figure 2B
Field Wiring Diagram
Page 2