Cooper Bussmann EMN IF677 User Manual

APPLICATION

EMN Series Manual Line Starters and Enclosures are used to
provide motor starting protection and manual across-the-line
starting and stopping of single and poly-phase AC motors.

EMN Series Manual Line Starters and Enclosures are suitable for
use in Class I, Groups C, D; Class II, Groups E, F, G and
Class III hazardous (classified) locations, as defined by the
National Electric Code® as well as in damp, wet or corrosive
locations.

EMN Series Manual Line Starters and Enclosures should be
installed, inspected, maintained, and operated by qualified and
competent personnel.

INSTALLATION

1. Select a mounting location that will provide suitable strength
and rigidity for supporting all contained wiring and control
devices. Figure 1 shows the mounting dimensions of EMN
Series enclosures. Drill two 7/16 inch mounting holes.

2. Securely fasten enclosure to the mounting surface then
attach into conduit system.

3. Remove the six cover bolts then lift cover off and carefully set
it aside to prevent damage to the ground joint.

4. EMN Enclosure furnished with starter: Remove starter
from enclosure then pull wires into enclosure making sure
that they are long enough to make the required connections.

Note: EMN Manual Motor Starter Enclosures ordered
complete with starter are furnished with heaters. One heater
is furnished with two-pole AC or DC starters and three
heaters with three-pole starters.

EMN Enclosure furnished without starter: Select starter
from Table 1 on page 2 (ordered separately). Install heaters
on starter (ordered separately). Refer to heater selector
listings. Pull wires into enclosure.

5. Mount starter into enclosure and make electrical connections
utilizing the wiring scheme established for the starter.

CAUTION

Hazardous location information specifying class and group
listing of each device is marked on the nameplate of each
enclosure. Also note that:

•

No conduit openings are to be added in the field.

•

All unused conduit openings must be plugged and these
plugs must be a minimum of 1/8 in. thick and have a minimum
of five threads engaged.

•

All conduits entering and leaving the enclosure must be
sealed with explosion-proof seals within 18 in. of the
enclosure.

Motor Starter
EMN Series Manual Line Starters and Enclosures

Installation & Maintenance Information

SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE

IF677

WARNING

To provide protection against fire or shock hazard, the
electrical power must be OFF before and during instal­lation and maintenance.

CAUTION

Hammers or prying tools must not be allowed to damage
the flat ground-joint surfaces. Do not handle the covers
roughly, or place them on surfaces that might damage or
scratch the flat ground-joint surfaces.

Figure 1 - Dimensions

IF 677 • 03/03 Copyright © 2003, Cooper Industries, Inc. Page 1

National Electrical Code ®is a registered Trademark of the National Fire Protection Association.

All statements, technical information and recommendations contained herein are based on information and tests we believe to be
reliable. The accuracy or completeness thereof are not guaranteed. In accordance with Crouse-Hinds "Terms and Conditions of Sale",
and since conditions of use are outside our control, the purchaser should determine the suitability of the product for the intended use
and assumes all risk and liability whatsoever in connection therewith.

Cooper Industries Inc. IF 677
Crouse-Hinds Division Revision 2
PO Box 4999, Syracuse, New York 13221 • U.S.A. Revised 03/03
Copyright© 2003, Cooper Industries, Inc. Supercedes 04/02

6. Test for wiring correctness with continuity checks and also
for unwanted grounds with insulation resistance tester.

7. Place starter handle in OFF position making sure that the
internal mechanism of the cover will properly engage the
starter.

8. Install cover. Securely tighten all cover bolts making certain
that no cover bolts are omitted. Use only bolts supplied with
the enclosure.

9. Pour sealing compound into sealing fittings in accordance
with the instructions supplied with each of the approved
fittings and sealing compound package labels.

MAINTENANCE

1. Frequent inspection should be made. Aschedule for main­tenance check should be determined by the envi­ronment and frequency of use. It is recommended that it
should be at least once a year.

2. If necessary to open enclosure for inspection or service,
always disconnect primary power source before opening
enclosure.

3. Perform visual, electrical, and mechanical checks on all
components on a regular basis.

•

Visually check for undue heating evidenced by
discoloration of wires or other components, damaged or
worn parts, or leakage evidenced by water or corrosion
in the interior.

•

Electrically check to make sure that all connections are
clean and tight, and that contacts in the components
make or break as required.

•

Mechanically check that all parts are properly
assembled, and operating mechanisms move freely.

CAUTION

Clean both ground-joint surfaces of body and cover before
installing. Dirt or foreign material must not accumulate on
flat ground-joint surfaces. Surfaces must seat fully against
each other to provide a proper explosionproof seal.

EMN Enclosure NEMA

Catalog No. Size Poles (Phase) Catalog Number

M-0

2 (1 Ph)
3 (3 Ph)

B100M0BX
B100M0CX

M-1

2 (1 Ph)
3 (3 Ph)

B100M1BX
B100M1CX

M-1P 2 (1 Ph) B100MDBX

1.

Two-pole starters require on heater, three-pole starters require

three heaters. These should be selected in accordance with t

he manufacturer's

recommendations. Most explosionproof motors are rated at 55oC, heaters should be selected accordingly.

Table 1

EMN24

Cutler-Hammer - B100 Series

Manaul Motor Line Starters

1