5. Repeat the proceeding steps if a second EVLA12 fixture is to be installed on the
ELPS50 power supply enclosure.
6. Proceed to Section C for conduit connection and wiring instructions.
C. Conduit Connection and Wiring
1a.Connect enclosure to properly grounded conduit system, installing conduit sealing
fittings as required by Section 501.15 and, if required, 502.15 of the National Electrical
Code plus any other applicable codes.
1b.If cable is utilized, a cable sealing fitting must be installed as required by Section
501.15 of the National Electrical Code plus any other applicable codes.
NOTE:Refer to Step 2b, making sure that the “designated disconnect” housing is
installed in the system.
2. Make all wiring connections following wiring diagram located on power supply battery
bracket.
NOTE:Although generally not required, the interior assembly may be removed to
facilitate wire pulling. Remove four (4) 1/4-20 screws and lock washers and
disconnect wire leads at the pilot light and switch. DO NOT handle interior roughly
or place it in an area where dirt, dust or grime will damage it. Replace as soon as all
wiring has been pulled into enclosure.
NOTE:If installing ELPS502, connection of lighting fixture supply leads is already
completed. Proceed to Step 2b.
2a.Connect EVLA12 lighting fixture(s) supply leads to terminals L+ (#6) and L- (#7) .
See figures 3 and 4.
2b. Connect incoming AC power 120, 220/240 or 277 VAC, 50 or 60 Hz emergency light
battery circuit through a “designated disconnect” switch.
NOTE: Insulation rating on 12V conductors must equal to that of the higher voltage
power supply leads in accordance with Article 300.3(C) of NEC.
Important:TO PROPERLY INSTALL AND OPERATE THE ELPS, YOU MUST INSTALL
A SEPARATE DISCONNECT SWITCH. IF THE DISCONNECT SWITCH IS LOCATED
IN THE HAZARDOUS AREA, YOU MUST INSTALL A CLASS I, DIVISION 1 RATED
SWITCH. USE CROUSE-HINDS EDS2129 OR EDS2129GB FOR GROUP B
APPLICATIONS. (See Warning below)
This Designated Disconnect Switch can be supplied as part of the ELPS502 emergency
light (Options S794 or Option S854).
Option S794- Key operated designated disconnect as part of the ELPS502 emergency
light. See Step 2c below to continue supply wiring
Option S854- Keyless Designated Disconnect as part of the ELPS502 emergency light.
See Step 2c below to continue supply wiring.
EDS2129 (EDS2129GB for Group B applications) - Designated Disconnect Remote
Mounted (not supplied). Install per the instructions supplied with the EDS2129(GB)
disconnect. Wire to terminals 8 and 9. See Step 2c to continue supply wiring.
2c. Connect 120 VAC primary (through designated disconnect) to terminal 120 (#3).
Connect 220/240 VAC primary (through designated disconnect) to terminal 220/240
(#4). Connect 277 VAC primary (through designated disconnect) to terminal 277 (#5).
Connect common to terminal COM (#2). Connect all equipment grounding conductors
to terminal GRD (#1). Connect battery connector to circuit board. Verify that
transformer connector is also connected to circuit board.
•To avoid explosion, all unused conduit openings must be plugged. Plug
must engage a minimum of five full threads. Use PLG plugs supplied with
the unit.
•To maintain explosionproof integrity, conduit sealing fittings MUST be
installed in each attached conduit run (within eighteen inches of the ELPS50
power supply enclosure in Class I locations).
•To maintain explosionproof integrity in Class I areas, conduit sealing fittings
are required on all conduit entrances (within eighteen inches of the ELPS50
power supply enclosure) for all remotely located emergency lighting fixtures.
IF 1510 • 05/06 Copyright © 2006, Cooper Industries, Inc. Page 3

Figure 4. ELPS50 Power Supply - Interior View

Figure 3. Wiring Diagram

WARNING
WARNING
• To avoid explosion, a Designated Disconnect position with lock-in/lock-out is
required for safe servicing of the completely wired unit. The lock-in/lock-out
capability will help prevent unauthorized opening of the circuit when the
system should be functioning and to help prevent energizing of the system
while it is being serviced, minimizing the possibility of arcing in the battery
circuit while the enclosure is open in a hazardous (classified) area.
• To avoid explosion, the designated disconnect switch, Cooper Crouse-Hinds
EDSC2129 (EDS2129GB for Group B applications) must be suitable for use
in the hazardous locations in which it is installed.
NOTE
In Class II and Class III and Simultaneous Presence locations, limit upward
aiming of fixture to a maximum of 30º above horizontal. Greater upward aiming
could lead to excessive dust buildup and dangerous overheating of the dust.

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ORANGE - NARANJA
BROWN - CAFE
BLACK - NEGRO
WHITE - BLANCO
MAIN CHARGER
TRANSFORMER
TRANSFORMADOR
PRINCIPAL DE
CARGA
BATTERY
BATERIA
21G03
RED - ROJO
GRD COM 120 220 277
TERMINAL BLOCK
BLOCK DE TERMINALES
PILOT LIGHT
LAMPARA PILOTO
TEST SWITCH
BUTON DE PRUEBA BATTERY DISCONNECT
SWITCH
INTERRUPTOR
DESCONECTADOR
DE BATERIA
EVLA12'S
127 240
RED - ROJO
YELLOW - AMARILLO
RED - ROJO
L+
L-
YELLOW - AMARILLO
YELLOW - AMARILLO
BLUE - AZUL
BLUE - AZUL
BLACK - NEGRO
RED - ROJO
BLACK - NEGRO
WARNING
•To avoid explosion or personal injury, all electrical power must be turned
OFF before and during installation and maintenance and installation area
must be free of hazardous atmospheres.
1 = GRD 4 = 220/240 7 = L -
2 = COM 5 = 277 8 = BATT +
3 = 120 6 = L + 9 = BATT -