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Installation Instructions for
120 Volt to 12 Volt Single Feed 150W Remote Magnetic
Transformers
TRANSFORMERS
250AT150T
950RM15012
1.4
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.
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 the circuit of the remote transformer to 150
Watt.
, it is important to wire the remote
MAXIMUM
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Install the Remote Transformer
1A
1
COM X1 X2 X3 X4
TRANSFORMER
BRACKET
PHILLIPS
SCREW
1B
NEUTRAL
POWER
LINE WIRE
COM X1 X2 X3 X4
5
6
HOT POWER
LINE WIRE
7
2
TRANSFORMER
TRANSFORMER COVER
1
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 side of the transformer.
2
4
Install a conduit and power line wires from the panel to
3
3
CONDUIT
remote transformer.
4
Do not
connect the power line wires to the panel at this
time.
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.
LOW VOLTAGE WIRE SIZE TABLE
TRANSFORMER
WATTAGE
150 WATT #8 GA #6 GA #4 GA #2 GA #1 GA#12 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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1C
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 150 watt loads. Lengths are the
distance from the transformer to the system power
feed connector.
13
ELECTRICAL BOX
11
COM X1 X2 X3 X4
12
14
CONDUIT
10
Install the low voltage wires from the transformer to the
10
electrical power feed box.
Insert one low voltage wire into the terminal marked
11
"COM" and tighten the screw firmly.
10
Insert the second low voltage wire into the "X2" terminal
12
tap (default) and tighten the screw firmly.
Connect the 120 volt power line wires at the panel.
13
14
8
Measure the voltage at the power line wires coming into
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 second
low voltage wire.
TERMINAL TAP TABLE
PRIMARY POWER
LINE VOLTAGE
105 - 109
110-114
115 - 120
121 - 125
TERMINAL TAP
TO BE USED
X4
X3
X2
X1
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.
3
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Check the System
2A
COM X1 X2 X3 X4
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
Replace the transformer cover and tighten the two
Phillips screws on the sides of the transformer.
4
3
PHILLIPS
SCREW
CIRCUIT BREAKER
SAVE THESE INSTRUCTIONS!
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7400 Linder Ave.
Skokie, IL 60077
847.410.4400
www.encompasslighting.com
© 2007 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.
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