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Installation Instructions for
120 Volt to 12 Volt Single Feed Two-Circuit 300W
Remote Magnetic Transformers
TRANSFORMERS
250AT2X300T
950RM2X30012
1.5
This product requires installation by qualified
electrician. Before installing be sure to read all
instructions and TURN THE POWER TO THE
ELECTRICAL BOX OFF.
CAUTION: RISK OF FIRE
GENERAL PRODUCT INFORMATION:
This transformer is ETL listed for use with low voltage lighting
systems of brands offered by Encompass Lighting Group.
This product is suitable only for indoor dry locations and
approved for use at any height above the finished floor.
A typical installation is shown. Specific installation must be in
accordance with the local electrical codes.
All 120 volt transformer wires must be connected to the same
phase.
This product may be dimmed only with a low voltage magnetic
dimmer. Using a dimmer not designed for low voltage
magnetic applications may work initially, but could eventually
cause transformer failure and will void the warranty.
dimmer must be derated as indicated by the dimmer
manufacturer.
This product is intended for use with Encompass Lighting
Group brands of low voltage lighting systems only.
During installation, make sure all power connections are tight.
Read all instructions thoroughly. Read "Important Safety
Information" on next column before proceeding with the
installation.
The
Important Safety Information
Do not conceal or extend bus bar conductors through a
building wall.
Do not install this lighting system in a damp or wet location.
To reduce the risk of fire and burns, do not install this lighting
system where the uninsulated open bus bar conductors can
be shorted or contact any conductive materials.
To reduce the risk of the system overheating and possibly
causing a fire, make sure all the connections are tight.
Do not install fixture assemblies closer than six inches to
curtains or similarly combustible materials.
Turn the electrical power off before modifying the lighting
system in any way.
The fixtures used with the system must be identified for use
with the corresponding system.
Minimum volume of the electrical box must be 6 cubic inches
(98 cubic centimeters).
To Reduce Risk of Fire
transformer for the system as described in this installation
instruction.
Load each circuit of the remote transformer to 300
Watt.
, it is important to wire the remote
MAXIMUM
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Select the Switching Option
Install the Remote Transformer
NOTE: Select one out of two possible switching
options that fits the design.
1A
SWITCH 1
CIRCUIT 1
CIRCUIT 2
Switch 1 turns on/off both Circuits.
2A
2
COMX X1 X2 X3 X4
1
TRANSFORMER
BRACKET
COMY Y1 Y2 Y3 Y4
PHILLIPS
SCREW
1B
SWITCH 1 SWITCH 2
CIRCUIT 1
CIRCUIT 2
Switch 1 turns on/off Circuit 1 and
Switch 2 turns on/off Circuit 2.
TRANSFORMER
1
TRANSFORMER COVER
BRACKET
NOTE: In order to use small gage wires from the
transformer to the electrical box, it is recommended to
install the remote transformer near (if possible) the
electrical box. See "Low Voltage Wire Size Table"
below.
1
Mount the transformer to a solid surface using the
keyhole slot on the mounting bracket (hardware not
included).
Remove the transformer cover by loosening the two
2
Phillips screws on the sides of the transformer.
2
LOW VOLTAGE WIRE SIZE TABLE
TRANSFORMER
WATTAGE
300 WATT #6 GA #4 GA #1 GA #1/0 GA #3/0 GA#10 GA
WIRE SIZE
FOR5FT
WIRE SIZE
FOR 6-15 FT
WIRE SIZE
FOR 16-20 FT
2
WIRE SIZE
FOR 21-40 FT
WIRE SIZE
FOR 40-60 FT
WIRE SIZE
FOR 61-90 FT
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2B
13 13
6
14
11
COMX X1 X2 X3 X4
5
13
12
COMY Y1 Y2 Y3 Y4
7
10
14
Install a conduit from the transformer to the electrical
8
box.
9
For the best performance, use the "Low Voltage Wire
Size Table" on page 2 to select the wire size.
NOTE: Other wire sizes that comply with electrical
code can be used, but may result in an increased
voltage drop and reduced lamp intensity.
NOTE: The THHN wire sizes are for 3% or less drop
in voltage based on 300 watt loads. Lengths are the
distance from the transformer to the system power
feed connector.
Install three low voltage wires from the transformer to
6
5
10
the electrical power feed box.
Insert one low voltage wire into the "X2" terminal tap
11
(default) and tighten the screw firmly. Mark this low
voltage wire in the electrical power feed box as
"HOT 1".
44
12
Insert the second low voltage wire into the "COMY"
terminal and tighten the screw firmly. Mark this low
voltage wire in the electrical power feed box as
"HOT 2".
NEUTRAL
POWER
LINE WIRE
HOT POWER
LINE WIRE
11
Install the conduit(s) and power line wires from the panel
3
CONDUIT
HOT 1
12
8
HOT 2
CONDUIT
to remote transformer.
4
Do not
connect the power line wires to the panel at this
time.
COM
13
Cut two short pieces of low voltage wires (THHN). Insert
13
one short low voltage wire into "COMX" terminal and
the other one into "Y2" terminal tap (default) and tighten
the screws. Connect these two short wires to the third
low voltage wire with a wire nut. Mark this low voltage
wire in the electrical power feed box as "COM".
14
Connect the 120 volt power line wires at the panel.
Measure the voltage at the power line wires coming into
15
the transformer. If the voltage is not in the range of
115 - 120 volt, then pick the proper terminal tap using
the "Terminal Tap Table" below to reconnect the low
voltage wire that was connected to "X2" and the short
wire that was connected to "Y2" terminal taps.
TERMINAL TAP TABLE
PRIMARY POWER
LINE VOLTAGE
105 - 109
110-114
115 - 120
121 - 125
TERMINAL TAP
TO BE USED
X4
X3
X2
X1
TERMINAL TAP
TO BE USED
Y4
Y3
Y2
Y1
5
Connect the 120V black transformer wire to the hot
power line wire with a wire nut.
6
Connect the 120V white transformer wire to the neutral
power line wire with a wire nut.
Connect the ground wire to the green wire or stud
7
labeled “ground” in the console.
WARNING: -Risk of Fire The terminal taps are not
for boosting the transformer low voltage power, they
are selected to ensure power output voltage based
upon power line conditions. Never use a higher
terminal tap to compensate for voltage drop, this may
overheat the low voltage wires and transformer. It is
recommended to use the wire size as indicated on
"Low Voltage Wire Size Table" on page 2 to avoid
excessive voltage drop.
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Check the System
3A
After installing the entire low voltage system, if the
1
lamps have low intensity, then measure the voltage at
the fixture closest to the power feed contacts with a
voltmeter. The system must be at least 80% loaded and
the voltmeter should read between 11V - 12V ~AC. If
the voltage does not fall in this range, call Encompass
Lighting Group "Technical Support" at 847-410-4606.
After installing the entire system, operate the system for
2
five minutes. On the low voltage side, all electrical
connection points should be no more than warm to the
touch. If a connection is hot to the touch, retighten the
connection and check to ensure that the temperature
decreases.
3
The transformer circuit breaker will trip if there is a short
in the system. After removing the cause of the short, the
circuit breaker needs to be reset to power the system
up.
4
CIRCUIT
BREAKER
COMX X1 X2 X3 X4
3
COMY Y1 Y2 Y3 Y4
3
CIRCUIT
BREAKER
4
PHILLIPS
SCREW
4
Replace the transformer cover and tighten the two
Phillips screws on the sides of the transformer.
SAVE THESE INSTRUCTIONS!
7400 Linder Ave, Skokie, IL 60077
847.410.4400
www.encompasslighting.com
© 2008 Encompass Lighting Group. All rights reserved. The "Encompass Lighting Group"
graphic is a registered trademark of Encompass Lighting Group. Encompass Lighting Group
reserves the right to change specifications for product improvements without notification.
A Generation Brands Company
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